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The best way to move beyond factory farming is not about the animals

News Feed
Wednesday, August 7, 2024

The most ambitious goal of the animal movement has always been to eradicate factory farming and inspire people to eat more plants and fewer animals. This only makes sense, as the scale of the violence endemic to industrial farming radically dwarfs all other forms of animal suffering. Beyond the problem of the inevitable suffering involved in the slaughter of animals we consume, factory farming necessitates new forms of animal abuse such as intensive confinement, drugs that keep sick animals just alive enough to be profitable, and genetic modifications that induce diseases. (While genetic modification is often interpreted to mean direct edits to a genome, the USDA’s definition also includes selective breeding, the technique the factory farm industry has used to deform animals beyond recognition.) These harms to animals, as we will see, are tightly linked to harms to humans.  This story is part of How Factory Farming Ends Read more from this special package analyzing the long fight against factory farming here. This series is supported by Animal Charity Evaluators, which received a grant from Builders Initiative. But the way forward for the animal movement may be less about swelling the ranks of vegetarians and vegans — which has long been its primary ambition — and more about identifying an overlapping consensus between social movements that center animals and those that center concerns like climate change and public health. These movements share an interest in shifting toward a more plant-based food system as never before. We should also share resources and tactics.  Today, government at every level, from local to federal, actively promotes consuming high levels of animal products and the continued growth of factory farming; large portions of the legal system work primarily to defend industrial farms against ordinary citizens and public advocates rather than the other way around (for one powerful illustration of this, see the documentary The Smell of Money). Only a broad coalition can hope to change this.  Increased collaboration with the public health movement will be particularly crucial in encouraging a more plant-based food system. In the short term, though, it is emerging collaborations with the environmental movement that show the most promise. The well-known lower carbon footprint of plant-based diets — as low as a quarter of the emissions of meat-heavy diets — provides a particularly powerful form of common ground.    Let’s consider a rather extraordinary development that resulted from animal and environmental groups working together that occurred in just the last year.     A groundbreaking experiment suggests reducing US meat eating is attainable Starting last September, hundreds of American college and university dining halls serving about a million students began to systematically modify how they served food in ways designed to substantially increase the consumption of plants. The schools, which have in common the use of Sodexo as a food service provider but little else, were guided in part by a recent peer-reviewed study finding that the use of “plant-based defaults” could significantly shift diners’ choices toward plant-based foods. (One of us, Aaron, is on the board of and helped launch an organization that partnered with Sodexo on this experiment, but he was not personally involved in the project.) In the three-month study, a hot meal station in three college dining halls, two in the American Northeast and one in the South, alternated between serving a plant-based and meat-based meal by default. When a plant-based entrée was the default, diners could ask for a meat meal. Depending on how conservatively the results are calculated, on average between 21.4 and 57.2 percent fewer meat-based meals were chosen when plant-based foods were the default. And, crucially, surveys found that diners remained as satisfied as ever (something that the presence of plant-based meats seemed to have helped in this study). A range of other public and private institutions — including governments, hospitals, and businesses — around the world are experimenting with similar tactics.  Diners do not need to be ethical superheroes, or even be ethically motivated, to eat in ways more in line with their values  The basic insight being employed here is that institutional food service providers already make decisions every day that shape what their customers choose by deciding, for example, what dish to list first on the menu, what entree to make the special, and what products to most heavily promote. We diners are already being nudged by food service providers toward more profitable foods (often animal products) every time we buy food. The strategies being employed at the 400 colleges and universities in one way or another involve a decision on the part of dining services to let concerns about health and sustainability — especially climate change — influence these existing decisions about food order, placement, and so forth.  This can be thought of as behavior architecture. Just as good physical architecture is aesthetically pleasing and makes it easy to do what we have come to that place to do, good behavior architecture in dining halls, supermarkets, and restaurants helps consumers make prosocial choices — like plant-based foods with lower climate impacts — the easiest choices. Diners do not need to be ethical superheroes, or even be ethically motivated, to eat in ways more in line with their values.  Two issues raised here seem especially important. The first is to better understand how recent and unique the new overlapping consensus between animal and ecological concerns is and what is making it work. The second is to consider the potentially even more consequential, but less-developed, coalitional possibilities of animal and ecological advocates teaming up with the public health sector to advocate a shift towards plant-based diets and away from factory farming.  In an era of ubiquitous factory farming, the public health sector has its own reasons to prefer a more plant-based food system — for example, the way that factory farms promote antibiotic resistance, an escalating global crisis associated with nearly 5 million annual deaths and increase the risk of zoonotic diseases like bird flu reaching pandemic proportions. Balanced plant-based diets are also widely regarded to have health advantages (especially lowering risk for heart disease), but since these benefits are well known, here we want to emphasize the distinct advantages of a more plant-based food system, beyond the general healthfulness of plant foods.  That a more plant-based diet is better for animals isn’t enough to move policy. This same diet shift is already being used to reduce climate impacts; it could also preserve the value of antibiotics and reduce the number of new diseases we face, as well as shore up political will to transform our diets. The climate science consensus on meat reduction The nascent alliance between animal and environmental advocates on food system change is not simple. The two movements have often had different agendas. For most of our lives, mainstream environmentalism has not seriously engaged the problems with the food system, especially the problems posed by industrial meat. This is true despite the fact scientists for decades have documented the enormous role meat plays in climate change and virtually every other environmental crisis.       Some of the reasons for this hesitancy are perfectly understandable: Emissions from the energy and transportation systems had proven technological solutions, which made solving emissions in those sectors comparatively straightforward. Food, by contrast, looked like a hornet’s nest. It’s hard enough to get people to focus on climate change, which until recently has felt so abstract, distant, and slow. To add into the conversation what is one of the most uncomfortable and contentious of all social issues — the ethics of eating — would likely have been an invitation to be ignored.  But sometimes being ignored is just another way to describe being ahead of one’s time. Addressing the role of food systems in climate change was perhaps ahead of its time 20 years ago when little progress had been made in energy and transport, but no more. Recent years have seen a new willingness and a recognition of the necessity to address the climate impacts of animal products. The highly regarded EAT-Lancet Commission, a panel of nutrition, sustainability, and agriculture experts, in 2019 concluded that even if we decarbonized everything else, if we don’t address our food system, it will be impossible to meet the emissions target set by the Paris climate agreement. Global food system studies on the interventions needed to address climate change — such as the study led by University of Oxford researcher Joseph Poore published in Science or the study published by the nonprofits GRAIN and the Institute for Agriculture and Trade Policy — consistently note the necessity of reducing meat consumption.  Environmental policy advocates still often remain reluctant to push these conclusions in the nitty-gritty of policy work, but this seems to us the natural reluctance before one finally rips off the Band-Aid. While the study of the Sodexo schools suggests that the experience of eating fewer animals need not reduce diner satisfaction, the idea of eating fewer animals remains politically unpopular. Suggesting eating less of anything can be branded as un-American, and conservative news outlets have made a fetish of warning that environmentalists are “coming for your burgers” even before any meaningful policies to shift diets have been enacted.       It will take considerable movement effort to transform the consensus in environmental science about the need to shift diets fully into organizational practice and policy advocacy, but we believe the case for eating more plants is now so well established that there is no turning back. Advocates in the environmental space who press for meat reduction will still often find themselves resisted; a quiet civil war is raging in the movement. There have been and will be ups and downs in that war, but we believe an invisible threshold has been crossed and that, battle by battle, policy by policy, the environmental movement is integrating the scientific consensus that meat reduction is essential to addressing climate change and many other ecological concerns.  The crucial third leg in the coalition against factory farming is public health That said, even when climate change advocates do address the problems with meat, there is the possibility of serious disagreements about the role of poultry and pork. Despite a high carbon footprint compared to plant-based foods and a load of other problems, poultry and pork meat can generally be produced at a fraction of the carbon footprint of beef. This is why we so often hear from environmentalists about the desirability of reducing beef and dairy consumption in particular: By the numbers, these industries have among the worst climate footprint of any food.       However, in terms of animal suffering, no industry is as horrific as today’s poultry industry; the pork industry is equally nightmarish, if smaller in scale (virtually all commercially available chickens and turkeys and the overwhelming majority of pig meat comes from factory farms). Modern industrial chickens have the disturbing distinction of being so genetically modified to produce more flesh and eggs that their very biology destines them to suffer from a range of diseases and incapacities (which is not to mention that it takes 100 or more individual chickens to produce as much meat as in a single cow). When climate activists suggest an overly numbers-driven approach to reducing food climate impacts, they may drive the production of more poultry and pig factory farms by recommending eating chicken or pork over beef. This is already happening.  Happily for the animal cause, though, data and research from the public health sector about the dangers of industrial poultry and pig production can ameliorate this tension. Studies show that while risks from different industries vary, if we don’t reduce animal-sourced foods, we will increase infectious disease. From the point of view of public health, the poultry industry is profoundly worrying, both because of the routine use of antibiotics that promotes antimicrobial resistance and the potential to seed a pandemic. In recent months, the H5N1 bird flu virus, which if it mutates to be able to spread among humans could make Covid-19 seem like the common cold, has leaped from birds to cattle and has infected several US dairy workers. The extreme industrialization of both the poultry and pork industries — with their use of densely packed, genetically uniform, and immunocompromised animals — is a perfect Petri dish for cultivating the next plague. Understanding how animal agriculture shapes human health The meat industry plays a pivotal role in public health. Check out Future Perfect’s coverage of meat’s impact on everything from pandemic risk to failing antibiotics to nutrition:  The meat we get from factory farms is a pandemic risk, too  The infectious disease trap of animal agriculture Big Meat just can’t quit antibiotics You probably don’t need to worry about your protein intake What a plant-based diet can and cannot do for you, explained by Netflix’s You Are What You Eat Just as climate activists have overlapping interests with animal advocates on diet change because of the high carbon footprint of animal products, public health advocates have overlapping interests because of the very basic biological fact that sick farmed animals not only suffer but can pose profound disease risk for human populations. The basic principle here is known in the international public health community as One Health, an approach that optimizes health outcomes by, in the words of the US Centers for Disease Control and Prevention (CDC), “recognizing the interconnection between people, animals, plants, and their shared environment.”   One Health is de rigueur in contemporary public health contexts. It is endorsed and promoted by the CDC, the World Bank, and just about every other authoritative advocate of public health. Theoretically, One Health already guides US law and policy, yet it has very little influence when it runs up against powerful political interests. One Health advocates, like animal advocates, have to contend with the power of industry; so far, sociopolitical factors like entrenched commitments to factory farming (among others) thwart the implementation of One Health frameworks. Ultimately, this means that factory farms benefit from unchecked externalities — the public rather than industry pays the immense cost of lost drugs and the cost of managing or preventing pandemics. Of course, this at least temporarily makes reducing the consumption of animal products that much harder by making them artificially cheap.  The current crisis of antibiotic use in the US meat industry dramatically illustrates how public health advocates struggle to rein in big meat and could benefit from coalition with the animal movement. For many decades, the scientific community, often emphasizing a One Health frame, has warned about the loss of lifesaving drugs because of the scale at which antibiotics are routinely administered to farmed animals. Despite high consumer demand for meat raised without antibiotics and government regulation of antibiotics in agriculture intensifying since the 2010s, the industry can’t quit antibiotics. In the factory farm system, sick animals are often more profitable than healthy ones, and sick animals need drugs to stay alive and to be profitable. This is why advocating for antibiotic-free meat without arguing for a change in production has ended up playing into the hands of industry. The problem has never been the drugs themselves, but the dismal conditions that necessitate them: The root problem is factory farming itself. What if public health concerns with the creation of antibiotic-resistant pathogens or the growth of new zoonotic diseases were taken up alongside concerns with cruelty and sustainability?  So, unsurprisingly, after a dip due to regulation starting in 2016, antibiotic use in agriculture, according to the latest FDA statistics, is ticking up again. But even this concerning growth in antibiotic sales understates the problem because a mounting body of evidence suggests that even meat labeled antibiotic-free is, illegally, often from animals that were fed drugs. A study published in Science of the US supply of antibiotic-free beef found that fully 15 percent of the meat was from animals illegally fed drugs. New evidence also suggests pork producers are using prohibited antibiotics. Despite the USDA admitting last year that antibiotic-free claims have indeed come into question, it has not yet taken corrective action. The industry is not all-powerful, but it is often more powerful than any one social movement. Divided we are conquered.  But what if public health advocates, who have long been frustrated with One Health being officially endorsed while being ignored in actual policy, worked in coordination with the nascent coalitions emerging between animal and climate groups? What if One Health concerns with the creation of antibiotic-resistant pathogens or the growth of new zoonotic diseases were taken up alongside concerns with cruelty and sustainability as a kind of third leg of the case for eating more plants and rolling back factory farming?  Something like this coalition seems the most promising direction in animal advocacy. We aren’t arguing anything novel; the power of coalitions is well documented in the social sciences, and most animal advocates are well aware of its value. But we are arguing that very recent developments, like the new willingness among environmentalists to take on the meat industry and the rise of One Health as the dominant paradigm for public health (despite failures to implement), are more important than generally understood.  The future will have to be collaborative Pulling these thoughts together, here is the paradigm shift we see unfolding: The animal advocacy movement has long argued the ethical case for ending factory farming and moving toward plant-based diets; now is the time to highlight the pragmatic advantage of these diets and to double down on coalitional efforts. A food system less dependent on factory farming and more plant-based is not just a way to advocate for animals; it is, among other things, a partial solution to climate change and to growing public health risks associated with factory farms.  We have emphasized coalition with environmentalists and One Health advocates in particular, but this is not meant to be exhaustive. As environmental justice activists know, the environmental and health harms we have noted fall disproportionately on BIPOC communities, making the factory farm a major driver of inequality and social injustice. This racialization of industrial farms has been especially well documented in North Carolina’s hog industry and points to the depth of other coalitional possibilities.   The environmental movement has helped make an unimpeachable case against beef and dairy, but it is the less-developed alliance with the public health sector that will seal the case against chicken and pig factory farms Unfortunately, it does not do much good to advocate for such coalitions generically as we are doing here. That is all too easy. What can do a lot of good — and what already has started a promising trend toward more plant-based eating at colleges and universities — is the pragmatic work of forging real coalitions. Ultimately, the default veg dining strategy employed by the 400 Sodexo schools was adopted because it was pragmatic. Shifting diets in this way achieved the dramatic reduction in climate impact that Sodexo sought in connection with its sustainability pledges, and it kept diners as happy with the food as ever, which was and is crucial to their bottom line. But even though plant-based defaults work, it is highly unlikely that Sodexo would have adopted them without the support it received from climate and animal activists. Even businesses like Sodexo, which made a climate pledge long before it started using plant-based defaults, often don’t appreciate the climate benefits of shifting diets or fear that it cannot be done without generating backlash.  This is one reason why advocacy remains crucial. Sodexo considered and finally pursued plant-based defaults only in the course of a partnership with two nonprofit advocacy groups, one coming out of the climate movement, Food For Climate League, and another — the organization we mentioned at the beginning of this essay that Aaron is connected to — out of the animal space, Better Food Foundation. A viable business case is not enough; it also needs champions.  The environmental-animal movement coalition that helped support the Sodexo changes shows that coalitions can work but not that they are abundant. In our experience, though there is a lot of goodwill toward collaboration on shifting diets among many animal and environmental advocates on the ground, this is still rarely reflected in meaningful organizational partnerships or resource sharing across movements. This is an entrenched situation and, despite the encouragement we’re giving, will not be easy to change. The present animal movement is not collaborative.  Choosing a vegetarian or vegan diet is an ethical ideal that is profoundly meaningful for some — we highly recommend it if you are so inclined. Jonathan’s book Eating Animals details his own journey into the ethics of eating (and was made into a film). But the animal advocacy movement’s success need not rest on the number of individuals who sign up for this admirable way of eating. What by contrast is essential to movement goals is the need to collectively reduce the consumption of animal products from factory farms. The environmental movement has helped make an unimpeachable case against beef and dairy, but it is the less-developed alliance with the public health sector that will seal the case against chicken and pig factory farming. Happily, the diet-shifting efforts at colleges and universities in the past year suggest, perhaps in a more visible way than ever before, that this is imminently possible — if we work in coalition. There are still miles to go, but the road to that almost impossibly ambitious goal of shifting diets is getting clearer. The future is collaborative.

The most ambitious goal of the animal movement has always been to eradicate factory farming and inspire people to eat more plants and fewer animals. This only makes sense, as the scale of the violence endemic to industrial farming radically dwarfs all other forms of animal suffering. Beyond the problem of the inevitable suffering involved […]

The most ambitious goal of the animal movement has always been to eradicate factory farming and inspire people to eat more plants and fewer animals. This only makes sense, as the scale of the violence endemic to industrial farming radically dwarfs all other forms of animal suffering.

Beyond the problem of the inevitable suffering involved in the slaughter of animals we consume, factory farming necessitates new forms of animal abuse such as intensive confinement, drugs that keep sick animals just alive enough to be profitable, and genetic modifications that induce diseases. (While genetic modification is often interpreted to mean direct edits to a genome, the USDA’s definition also includes selective breeding, the technique the factory farm industry has used to deform animals beyond recognition.) These harms to animals, as we will see, are tightly linked to harms to humans. 

This story is part of How Factory Farming Ends

Read more from this special package analyzing the long fight against factory farming here. This series is supported by Animal Charity Evaluators, which received a grant from Builders Initiative.

But the way forward for the animal movement may be less about swelling the ranks of vegetarians and vegans — which has long been its primary ambition — and more about identifying an overlapping consensus between social movements that center animals and those that center concerns like climate change and public health. These movements share an interest in shifting toward a more plant-based food system as never before. We should also share resources and tactics. 

Today, government at every level, from local to federal, actively promotes consuming high levels of animal products and the continued growth of factory farming; large portions of the legal system work primarily to defend industrial farms against ordinary citizens and public advocates rather than the other way around (for one powerful illustration of this, see the documentary The Smell of Money). Only a broad coalition can hope to change this. 

Increased collaboration with the public health movement will be particularly crucial in encouraging a more plant-based food system. In the short term, though, it is emerging collaborations with the environmental movement that show the most promise. The well-known lower carbon footprint of plant-based diets — as low as a quarter of the emissions of meat-heavy diets — provides a particularly powerful form of common ground.   

Let’s consider a rather extraordinary development that resulted from animal and environmental groups working together that occurred in just the last year.    

A groundbreaking experiment suggests reducing US meat eating is attainable

Starting last September, hundreds of American college and university dining halls serving about a million students began to systematically modify how they served food in ways designed to substantially increase the consumption of plants. The schools, which have in common the use of Sodexo as a food service provider but little else, were guided in part by a recent peer-reviewed study finding that the use of “plant-based defaults” could significantly shift diners’ choices toward plant-based foods. (One of us, Aaron, is on the board of and helped launch an organization that partnered with Sodexo on this experiment, but he was not personally involved in the project.)

In the three-month study, a hot meal station in three college dining halls, two in the American Northeast and one in the South, alternated between serving a plant-based and meat-based meal by default. When a plant-based entrée was the default, diners could ask for a meat meal. Depending on how conservatively the results are calculated, on average between 21.4 and 57.2 percent fewer meat-based meals were chosen when plant-based foods were the default. And, crucially, surveys found that diners remained as satisfied as ever (something that the presence of plant-based meats seemed to have helped in this study). A range of other public and private institutions — including governments, hospitals, and businesses — around the world are experimenting with similar tactics. 

Diners do not need to be ethical superheroes, or even be ethically motivated, to eat in ways more in line with their values 

The basic insight being employed here is that institutional food service providers already make decisions every day that shape what their customers choose by deciding, for example, what dish to list first on the menu, what entree to make the special, and what products to most heavily promote. We diners are already being nudged by food service providers toward more profitable foods (often animal products) every time we buy food. The strategies being employed at the 400 colleges and universities in one way or another involve a decision on the part of dining services to let concerns about health and sustainability — especially climate change — influence these existing decisions about food order, placement, and so forth. 

photo of a dining hall food station where Tofu Tiki Masala and cilantro basmati rice are served and a nearby sign says chicken tiki masala can be requested by asking the service staff.

This can be thought of as behavior architecture. Just as good physical architecture is aesthetically pleasing and makes it easy to do what we have come to that place to do, good behavior architecture in dining halls, supermarkets, and restaurants helps consumers make prosocial choices — like plant-based foods with lower climate impacts — the easiest choices. Diners do not need to be ethical superheroes, or even be ethically motivated, to eat in ways more in line with their values. 

Two issues raised here seem especially important. The first is to better understand how recent and unique the new overlapping consensus between animal and ecological concerns is and what is making it work. The second is to consider the potentially even more consequential, but less-developed, coalitional possibilities of animal and ecological advocates teaming up with the public health sector to advocate a shift towards plant-based diets and away from factory farming. 

In an era of ubiquitous factory farming, the public health sector has its own reasons to prefer a more plant-based food system — for example, the way that factory farms promote antibiotic resistance, an escalating global crisis associated with nearly 5 million annual deaths and increase the risk of zoonotic diseases like bird flu reaching pandemic proportions. Balanced plant-based diets are also widely regarded to have health advantages (especially lowering risk for heart disease), but since these benefits are well known, here we want to emphasize the distinct advantages of a more plant-based food system, beyond the general healthfulness of plant foods. 

That a more plant-based diet is better for animals isn’t enough to move policy. This same diet shift is already being used to reduce climate impacts; it could also preserve the value of antibiotics and reduce the number of new diseases we face, as well as shore up political will to transform our diets.

The climate science consensus on meat reduction

The nascent alliance between animal and environmental advocates on food system change is not simple. The two movements have often had different agendas. For most of our lives, mainstream environmentalism has not seriously engaged the problems with the food system, especially the problems posed by industrial meat. This is true despite the fact scientists for decades have documented the enormous role meat plays in climate change and virtually every other environmental crisis.      

Some of the reasons for this hesitancy are perfectly understandable: Emissions from the energy and transportation systems had proven technological solutions, which made solving emissions in those sectors comparatively straightforward. Food, by contrast, looked like a hornet’s nest. It’s hard enough to get people to focus on climate change, which until recently has felt so abstract, distant, and slow. To add into the conversation what is one of the most uncomfortable and contentious of all social issues — the ethics of eating — would likely have been an invitation to be ignored. 

But sometimes being ignored is just another way to describe being ahead of one’s time. Addressing the role of food systems in climate change was perhaps ahead of its time 20 years ago when little progress had been made in energy and transport, but no more. Recent years have seen a new willingness and a recognition of the necessity to address the climate impacts of animal products.

The highly regarded EAT-Lancet Commission, a panel of nutrition, sustainability, and agriculture experts, in 2019 concluded that even if we decarbonized everything else, if we don’t address our food system, it will be impossible to meet the emissions target set by the Paris climate agreement. Global food system studies on the interventions needed to address climate change — such as the study led by University of Oxford researcher Joseph Poore published in Science or the study published by the nonprofits GRAIN and the Institute for Agriculture and Trade Policy — consistently note the necessity of reducing meat consumption. 

Environmental policy advocates still often remain reluctant to push these conclusions in the nitty-gritty of policy work, but this seems to us the natural reluctance before one finally rips off the Band-Aid. While the study of the Sodexo schools suggests that the experience of eating fewer animals need not reduce diner satisfaction, the idea of eating fewer animals remains politically unpopular. Suggesting eating less of anything can be branded as un-American, and conservative news outlets have made a fetish of warning that environmentalists are “coming for your burgers” even before any meaningful policies to shift diets have been enacted.      

It will take considerable movement effort to transform the consensus in environmental science about the need to shift diets fully into organizational practice and policy advocacy, but we believe the case for eating more plants is now so well established that there is no turning back. Advocates in the environmental space who press for meat reduction will still often find themselves resisted; a quiet civil war is raging in the movement. There have been and will be ups and downs in that war, but we believe an invisible threshold has been crossed and that, battle by battle, policy by policy, the environmental movement is integrating the scientific consensus that meat reduction is essential to addressing climate change and many other ecological concerns. 

The crucial third leg in the coalition against factory farming is public health

That said, even when climate change advocates do address the problems with meat, there is the possibility of serious disagreements about the role of poultry and pork. Despite a high carbon footprint compared to plant-based foods and a load of other problems, poultry and pork meat can generally be produced at a fraction of the carbon footprint of beef. This is why we so often hear from environmentalists about the desirability of reducing beef and dairy consumption in particular: By the numbers, these industries have among the worst climate footprint of any food.      

However, in terms of animal suffering, no industry is as horrific as today’s poultry industry; the pork industry is equally nightmarish, if smaller in scale (virtually all commercially available chickens and turkeys and the overwhelming majority of pig meat comes from factory farms). Modern industrial chickens have the disturbing distinction of being so genetically modified to produce more flesh and eggs that their very biology destines them to suffer from a range of diseases and incapacities (which is not to mention that it takes 100 or more individual chickens to produce as much meat as in a single cow). When climate activists suggest an overly numbers-driven approach to reducing food climate impacts, they may drive the production of more poultry and pig factory farms by recommending eating chicken or pork over beef. This is already happening

Chart showing US per capita meat consumption more than doubling over the last 50 years while beef consumption declines by a quarter.

Happily for the animal cause, though, data and research from the public health sector about the dangers of industrial poultry and pig production can ameliorate this tension. Studies show that while risks from different industries vary, if we don’t reduce animal-sourced foods, we will increase infectious disease. From the point of view of public health, the poultry industry is profoundly worrying, both because of the routine use of antibiotics that promotes antimicrobial resistance and the potential to seed a pandemic.

In recent months, the H5N1 bird flu virus, which if it mutates to be able to spread among humans could make Covid-19 seem like the common cold, has leaped from birds to cattle and has infected several US dairy workers. The extreme industrialization of both the poultry and pork industries — with their use of densely packed, genetically uniform, and immunocompromised animals — is a perfect Petri dish for cultivating the next plague.

Understanding how animal agriculture shapes human health

The meat industry plays a pivotal role in public health. Check out Future Perfect’s coverage of meat’s impact on everything from pandemic risk to failing antibiotics to nutrition: 

Just as climate activists have overlapping interests with animal advocates on diet change because of the high carbon footprint of animal products, public health advocates have overlapping interests because of the very basic biological fact that sick farmed animals not only suffer but can pose profound disease risk for human populations. The basic principle here is known in the international public health community as One Health, an approach that optimizes health outcomes by, in the words of the US Centers for Disease Control and Prevention (CDC), “recognizing the interconnection between people, animals, plants, and their shared environment.”  

One Health is de rigueur in contemporary public health contexts. It is endorsed and promoted by the CDC, the World Bank, and just about every other authoritative advocate of public health. Theoretically, One Health already guides US law and policy, yet it has very little influence when it runs up against powerful political interests. One Health advocates, like animal advocates, have to contend with the power of industry; so far, sociopolitical factors like entrenched commitments to factory farming (among others) thwart the implementation of One Health frameworks. Ultimately, this means that factory farms benefit from unchecked externalities — the public rather than industry pays the immense cost of lost drugs and the cost of managing or preventing pandemics. Of course, this at least temporarily makes reducing the consumption of animal products that much harder by making them artificially cheap. 

The current crisis of antibiotic use in the US meat industry dramatically illustrates how public health advocates struggle to rein in big meat and could benefit from coalition with the animal movement. For many decades, the scientific community, often emphasizing a One Health frame, has warned about the loss of lifesaving drugs because of the scale at which antibiotics are routinely administered to farmed animals. Despite high consumer demand for meat raised without antibiotics and government regulation of antibiotics in agriculture intensifying since the 2010s, the industry can’t quit antibiotics. In the factory farm system, sick animals are often more profitable than healthy ones, and sick animals need drugs to stay alive and to be profitable. This is why advocating for antibiotic-free meat without arguing for a change in production has ended up playing into the hands of industry. The problem has never been the drugs themselves, but the dismal conditions that necessitate them: The root problem is factory farming itself.

What if public health concerns with the creation of antibiotic-resistant pathogens or the growth of new zoonotic diseases were taken up alongside concerns with cruelty and sustainability? 

So, unsurprisingly, after a dip due to regulation starting in 2016, antibiotic use in agriculture, according to the latest FDA statistics, is ticking up again. But even this concerning growth in antibiotic sales understates the problem because a mounting body of evidence suggests that even meat labeled antibiotic-free is, illegally, often from animals that were fed drugs. A study published in Science of the US supply of antibiotic-free beef found that fully 15 percent of the meat was from animals illegally fed drugs. New evidence also suggests pork producers are using prohibited antibiotics. Despite the USDA admitting last year that antibiotic-free claims have indeed come into question, it has not yet taken corrective action.

The industry is not all-powerful, but it is often more powerful than any one social movement. Divided we are conquered. 

But what if public health advocates, who have long been frustrated with One Health being officially endorsed while being ignored in actual policy, worked in coordination with the nascent coalitions emerging between animal and climate groups? What if One Health concerns with the creation of antibiotic-resistant pathogens or the growth of new zoonotic diseases were taken up alongside concerns with cruelty and sustainability as a kind of third leg of the case for eating more plants and rolling back factory farming? 

Something like this coalition seems the most promising direction in animal advocacy. We aren’t arguing anything novel; the power of coalitions is well documented in the social sciences, and most animal advocates are well aware of its value. But we are arguing that very recent developments, like the new willingness among environmentalists to take on the meat industry and the rise of One Health as the dominant paradigm for public health (despite failures to implement), are more important than generally understood. 

The future will have to be collaborative

Pulling these thoughts together, here is the paradigm shift we see unfolding: The animal advocacy movement has long argued the ethical case for ending factory farming and moving toward plant-based diets; now is the time to highlight the pragmatic advantage of these diets and to double down on coalitional efforts. A food system less dependent on factory farming and more plant-based is not just a way to advocate for animals; it is, among other things, a partial solution to climate change and to growing public health risks associated with factory farms. 

We have emphasized coalition with environmentalists and One Health advocates in particular, but this is not meant to be exhaustive. As environmental justice activists know, the environmental and health harms we have noted fall disproportionately on BIPOC communities, making the factory farm a major driver of inequality and social injustice. This racialization of industrial farms has been especially well documented in North Carolina’s hog industry and points to the depth of other coalitional possibilities.  

The environmental movement has helped make an unimpeachable case against beef and dairy, but it is the less-developed alliance with the public health sector that will seal the case against chicken and pig factory farms

Unfortunately, it does not do much good to advocate for such coalitions generically as we are doing here. That is all too easy. What can do a lot of good — and what already has started a promising trend toward more plant-based eating at colleges and universities — is the pragmatic work of forging real coalitions. Ultimately, the default veg dining strategy employed by the 400 Sodexo schools was adopted because it was pragmatic. Shifting diets in this way achieved the dramatic reduction in climate impact that Sodexo sought in connection with its sustainability pledges, and it kept diners as happy with the food as ever, which was and is crucial to their bottom line.

But even though plant-based defaults work, it is highly unlikely that Sodexo would have adopted them without the support it received from climate and animal activists. Even businesses like Sodexo, which made a climate pledge long before it started using plant-based defaults, often don’t appreciate the climate benefits of shifting diets or fear that it cannot be done without generating backlash. 

This is one reason why advocacy remains crucial. Sodexo considered and finally pursued plant-based defaults only in the course of a partnership with two nonprofit advocacy groups, one coming out of the climate movement, Food For Climate League, and another — the organization we mentioned at the beginning of this essay that Aaron is connected to — out of the animal space, Better Food Foundation. A viable business case is not enough; it also needs champions. 

The environmental-animal movement coalition that helped support the Sodexo changes shows that coalitions can work but not that they are abundant. In our experience, though there is a lot of goodwill toward collaboration on shifting diets among many animal and environmental advocates on the ground, this is still rarely reflected in meaningful organizational partnerships or resource sharing across movements. This is an entrenched situation and, despite the encouragement we’re giving, will not be easy to change. The present animal movement is not collaborative. 

Choosing a vegetarian or vegan diet is an ethical ideal that is profoundly meaningful for some — we highly recommend it if you are so inclined. Jonathan’s book Eating Animals details his own journey into the ethics of eating (and was made into a film). But the animal advocacy movement’s success need not rest on the number of individuals who sign up for this admirable way of eating.

What by contrast is essential to movement goals is the need to collectively reduce the consumption of animal products from factory farms. The environmental movement has helped make an unimpeachable case against beef and dairy, but it is the less-developed alliance with the public health sector that will seal the case against chicken and pig factory farming. Happily, the diet-shifting efforts at colleges and universities in the past year suggest, perhaps in a more visible way than ever before, that this is imminently possible — if we work in coalition. There are still miles to go, but the road to that almost impossibly ambitious goal of shifting diets is getting clearer. The future is collaborative.

Read the full story here.
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Giant Sloths and Many Other Massive Creatures Were Once Common on Our Planet. With Environmental Changes, Such Giants Could Thrive Again

If large creatures like elephants, giraffes and bison are allowed to thrive, they could alter habitats that allow for the rise of other giants

Giant Sloths and Many Other Massive Creatures Were Once Common on Our Planet. With Environmental Changes, Such Giants Could Thrive Again If large creatures like elephants, giraffes and bison are allowed to thrive, they could alter habitats that allow for the rise of other giants Riley Black - Science Correspondent July 11, 2025 8:00 a.m. Ancient sloths lived in trees, on mountains, in deserts, in boreal forests and on open savannas. Some grew as large as elephants. Illustration by Diego Barletta The largest sloth of all time was the size of an elephant. Known to paleontologists as Eremotherium, the shaggy giant shuffled across the woodlands of the ancient Americas between 60,000 and five million years ago. Paleontologists have spent decades hotly debating why such magnificent beasts went extinct, the emerging picture involving a one-two punch of increasing human influence on the landscape and a warmer interglacial climate that began to change the world’s ecosystems. But even less understood is how our planet came to host entire communities of such immense animals during the Pleistocene. Now, a new study on the success of the sloths helps to reveal how the world of Ice Age giants came to be, and hints that an Earth brimming with enormous animals could come again. Florida Museum of Natural History paleontologist Rachel Narducci and colleagues tracked how sloths came to be such widespread and essential parts of the Pleistocene Americas and published their findings in Science this May. The researchers found that climate shifts that underwrote the spread of grasslands allowed big sloths to arise, the shaggy mammals then altering those habitats to maintain open spaces best suited to big bodies capable of moving long distances. The interactions between the animals and environment show how giants attained their massive size, and how strange it is that now our planet has fewer big animals than would otherwise be here. Earth still boasts some impressively big species. In fact, the largest animal of all time is alive right now and only evolved relatively recently. The earliest blue whale fossils date to about 1.5 million years ago, and, at 98 feet long and more than 200 tons, the whale is larger than any mammoth or dinosaur. Our planet has always boasted a greater array of small species than large ones, even during prehistoric ages thought of as synonymous with megafauna. Nevertheless, Earth’s ecosystems are still in a megafaunal lull that began at the close of the Ice Age. “I often say we are living on a downsized planet Earth,” says University of Maine paleoecologist Jacquelyn Gill.Consider what North America was like during the Pleistocene, between 11,000 years and two million ago. The landmass used to host multiple forms of mammoths, mastodons, giant ground sloths, enormous armadillos, multiple species of sabercat, huge bison, dire wolves and many more large creatures that formed ancient ecosystems unlike anything on our planet today. In addition, many familiar species such as jaguars, black bears, coyotes, white-tailed deer and golden eagles also thrived. Elsewhere in the world lived terror birds taller than an adult human, wombats the size of cars, woolly rhinos, a variety of elephants with unusual tusks and other creatures. Ecosystems capable of supporting such giants have been the norm rather than the exception for tens of millions of years. Giant sloths were among the greatest success stories among the giant-size menagerie. The herbivores evolved on South America when it was still an island continent, only moving into Central and North America as prehistoric Panama connected the landmasses about 2.7 million years ago. Some were small, like living two- and three-toed sloths, while others embodied a range of sizes all the way up to elephant-sized giants like Eremotherium and the “giant beast” Megatherium. An Eremotherium skeleton at the Houston Museum of Natural Science demonstrates just how large the creature grew. James Nielsen / Houston Chronicle via Getty Images The earliest sloths originated on South America about 35 million years ago. They were already big. Narducci and colleagues estimate that the common ancestor of all sloths was between about 150 and 770 pounds—or similar to the range of sizes seen among black bears today—and they walked on the ground. “I was surprised and thrilled” to find that sloths started off large, Narducci says, as ancestral forms of major mammal groups are often small, nocturnal creatures. The earliest sloths were already in a good position to shift with Earth’s climate and ecological changes. The uplift of the Andes Mountains in South America led to changes on the continent as more open, drier grasslands spread where there had previously been wetter woodlands and forests. While some sloths became smaller as they spent more time around and within trees, the grasslands would host the broadest diversity of sloth species. The grasslands sloths were the ones that ballooned to exceptional sizes. Earth has been shifting between warmer and wetter times, like now, and cooler and drier climates over millions of years. The chillier and more arid times are what gave sloths their size boost. During these colder spans, bigger sloths were better able to hold on to their body heat, but they also didn’t need as much water, and they were capable of traveling long distances more efficiently thanks to their size. “The cooler and drier the climate, especially after 11.6 million years ago, led to expansive grasslands, which tends to favor the evolution of increasing body mass,” Narducci says. The combination of climate shifts, mountain uplift and vegetation changes created environments where sloths could evolve into a variety of forms—including multiple times when sloths became giants again. Gill says that large body size was a “winning strategy” for herbivores. “At a certain point, megaherbivores get so large that most predators can’t touch them; they’re able to access nutrition in foods that other animals can’t really even digest thanks to gut microbes that help them digest cellulose, and being large means you’re also mobile,” Gill adds, underscoring advantages that have repeatedly pushed animals to get big time and again. The same advantages underwrote the rise of the biggest dinosaurs as well as more recent giants like the sloths and mastodons. As large sloths could travel further, suitable grassland habitats stretched from Central America to prehistoric Florida. “This is what also allowed for their passage into North America,” Narducci says. Sloths were able to follow their favored habitats between continents. If the world were to shift back toward cooler and drier conditions that assisted the spread of the grasslands that gave sloths their size boost, perhaps similar giants could evolve. The sticking point is what humans are doing to Earth’s climate, ecosystems and existing species. The diversity and number of large species alive today is vastly, and often negatively, affected by humans. A 2019 study of human influences on 362 megafauna species, on land and in the water, found that 70 percent are diminishing in number, and 59 percent are getting dangerously close to extinction. But if that relationship were to change, either through our actions or intentions, studies like the new paper on giant sloths hint that ecosystems brimming with a wealth of megafaunal species could evolve again. Big animals change the habitats where they live, which in turn tends to support more large species adapted to those environments. The giant sloths that evolved among ancient grasslands helped to keep those spaces open in tandem with other big herbivores, such as mastodons, as well as the large carnivores that preyed upon them. Paleontologists and ecologists know this from studies of how large animals such as giraffes and rhinos affect vegetation around them. Big herbivores, in particular, tend to keep habitats relatively open. Elephants and other big beasts push over trees, trample vegetation underfoot, eat vast amounts of greenery and transport seeds in their dung, disassembling vegetation while unintentionally planting the beginnings of new habitats. Such broad, open spaces were essential to the origins of the giant sloths, and so creating wide-open spaces helps spur the evolution of giants to roam such environments. For now, we are left with the fossil record of giant animals that were here so recently that some of their bones aren’t even petrified, skin and fur still clinging to some skeletons. “The grasslands they left behind are just not the same, in ways we’re really only starting to understand and appreciate,” Gill says. A 2019 study on prehistoric herbivores in Africa, for example, found that the large plant-eaters altered the water cycling, incidence of fire and vegetation of their environment in a way that has no modern equivalent and can’t just be assumed to be an ancient version of today’s savannas. The few megaherbivores still with us alter the plant life, water flow, seed dispersal and other aspects of modern environments in their own unique ways, she notes, which should be a warning to us to protect them—and the ways in which they affect our planet. If humans wish to see the origin of new magnificent giants like the ones we visit museums to see, we must change our relationship to the Earth first. Get the latest Science stories in your inbox.

How changes in California culture have influenced the evolution of wild animals in Los Angeles

A new study argues that religion, politics and war affect how animals and plants in cities evolve, and the confluence of these forces seem to be actively affecting urban wildlife in L.A.

For decades, biologists have studied how cities affect wildlife by altering food supplies, fragmenting habitats and polluting the environment. But a new global study argues that these physical factors are only part of the story. Societal factors, the researchers claim, especially those tied to religion, politics and war, also leave lasting marks on the evolutionary paths of the animals and plants that share our cities.Published in Nature Cities, the comprehensive review synthesizes evidence from cities worldwide, revealing how human conflict and cultural practices affect wildlife genetics, behavior and survival in urban environments.The paper challenges the tendency to treat the social world as separate from ecological processes. Instead, the study argues, we should consider the ways the aftershocks of religious traditions, political systems and armed conflicts can influence the genetic structure of urban wildlife populations. (Gabriella Angotti-Jones / Los Angeles Times) “Social sciences have been very far removed from life sciences for a very long time, and they haven’t been integrated,” said Elizabeth Carlen, a biologist at Washington University in St. Louis and co-lead author of the study. “We started just kind of playing around with what social and cultural processes haven’t been talked about,” eventually focusing on religion, politics and war because of their persistent yet underexamined impacts on evolutionary biology, particularly in cities, where cultural values and built environments are densely concentrated.Carlen’s own work in St. Louis examines how racial segregation and urban design, often influenced by policing strategies, affect ecological conditions and wild animals’ access to green spaces.“Crime prevention through environmental design,” she said, is one example of how these factors influence urban wildlife. “Law enforcement can request that there not be bushes … or short trees, because then they don’t have a sight line across the park.” Although that design choice may serve surveillance goals, it also limits the ability of small animals to navigate those spaces.These patterns, she emphasized, aren’t unique to St. Louis. “I’m positive that it’s happening in Los Angeles. Parks in Beverly Hills are going to look very different than parks in Compton. And part of that is based on what policing looks like in those different places.” This may very well be the case, as there is a significantly lower level of urban tree species richness in areas like Compton than in areas like Beverly Hills, according to UCLA’s Biodiversity Atlas. A coyote wanders onto the fairway, with the sprinklers turned on, as a golfer makes his way back to his cart after hitting a shot on the 16th hole of the Harding golf course at Griffith Park. (Mel Melcon / Los Angeles Times) The study also examines war and its disruptions, which can have unpredictable effects on animal populations. Human evacuation from war zones can open urban habitats to wildlife, while the destruction of green spaces or contamination of soil and water can fragment ecosystems and reduce genetic diversity.In Kharkiv, Ukraine, for example, human displacement during the Russian invasion led to the return of wild boars and deer to urban parks, according to the study. In contrast, sparrows, which depend on human food waste, nearly vanished from high-rise areas.All of this, the researchers argue, underscores the need to rethink how cities are designed and managed by recognizing how religion, politics and war shape not just human communities but also the evolutionary trajectories of urban wildlife. By integrating ecological and social considerations into urban development, planners and scientists can help create cities that are more livable for people while also supporting the long-term genetic diversity and adaptability of the other species that inhabit them.This intersection of culture and biology may be playing out in cities across the globe, including Los Angeles.A study released earlier this year tracking coyotes across L.A. County found that the animals were more likely to avoid wealthier neighborhoods, not because of a lack of access or food scarcity, but possibly due to more aggressive human behavior toward them and higher rates of “removal” — including trapping and releasing elsewhere, and in some rare cases, killing them. In lower-income areas, where trapping is less common, coyotes tended to roam more freely, even though these neighborhoods often had more pollution and fewer resources that would typically support wild canines. Researchers say these patterns reflect how broader urban inequities are written directly into the movements of and risks faced by wildlife in the city.Black bears, parrots and even peacocks tell a similar story in Los Angeles. Wilson Sherman, a PhD student at UCLA who is studying human-black bear interactions, highlights how local politics and fragmented municipal governance shape not only how animals are managed but also where they appear. (Carolyn Cole / Los Angeles Times) “Sierra Madre has an ordinance requiring everyone to have bear-resistant trash cans,” Sherman noted. “Neighboring Arcadia doesn’t.” This kind of patchwork governance, Sherman said, can influence where wild animals ultimately spend their time, creating a mosaic of risk and opportunity for species whose ranges extend across multiple jurisdictions.Cultural values also play a role. Thriving populations of non-native birds, such as Amazon parrots and peacocks, illustrate how aesthetic preferences and everyday choices can significantly influence the city’s ecological makeup in lasting ways.Sherman also pointed to subtler, often overlooked influences, such as policing and surveillance infrastructure. Ideally, the California Department of Fish and Wildlife would be the first agency to respond in a “wildlife situation,” as Sherman put it. But, he said, what often ends up happening is that people default to calling the police, especially when the circumstances involve animals that some urban-dwelling humans may find threatening, like bears.Police departments typically do not possess the same expertise and ability as CDFW to manage and then relocate bears. If a bear poses a threat to human life, police policy is to kill the bear. However, protocols for responding to wildlife conflicts that are not life-threatening can vary from one community to another. And how police use non-lethal methods of deterrence — such as rubber bullets and loud noises — can shape bear behavior.Meanwhile, the growing prevalence of security cameras and motion-triggered alerts has provided residents with new forms of visibility into urban biodiversity. “That might mean that people are suddenly aware that a coyote is using their yard,” Sherman said. In turn, that could trigger a homeowner to purposefully rework the landscape of their property so as to discourage coyotes from using it. Surveillance systems, he said, are quietly reshaping both public perception and policy around who belongs in the city, and who doesn’t. A mountain lion sits in a tree after being tranquilized along San Vicente Boulevard in Brentwood on Oct. 27, 2022. (Wally Skalij / Los Angeles Times) Korinna Domingo, founder and director of the Cougar Conservancy, emphasized how cougar behavior in Los Angeles is similarly shaped by decades of urban development, fragmented landscapes and the social and political choices that structure them. “Policies like freeway construction, zoning and even how communities have been historically policed or funded can affect where and how cougars move throughout L.A.,” she said. For example, these forces have prompted cougars to adapt by becoming more nocturnal, using culverts or taking riskier crossings across fragmented landscapes.Urban planning and evolutionary consequences are deeply intertwined, Domingo says. For example, mountain lion populations in the Santa Monica and Santa Ana mountains have shown signs of reduced genetic diversity due to inbreeding, an issue created not by natural processes, but by political and planning decisions — such as freeway construction and zoning decisions— that restricted their movement decades ago.Today, the Wallis Annenberg Wildlife Crossing, is an attempt to rectify that. The massive infrastructure project is happening only, Domingo said, “because of community, scientific and political will all being aligned.”However, infrastructure alone isn’t enough. “You can have habitat connectivity all you want,” she said, but you also have to think about social tolerance. Urban planning that allows for animal movement also increases the likelihood of contact with people, pets and livestock — which means humans need to learn how to interact with wild animals in a healthier way.In L.A., coexistence strategies can look very different depending on the resources, ordinances and attitudes of each community. Although wealthier residents may have the means to build predator-proof enclosures, others lack the financial or institutional support to do the same. And some with the means simply choose not to, instead demanding lethal removal., “Wildlife management is not just about biology,” Domingo said. “It’s about values, power, and really, who’s at the table.”Wildlife management in the United States has long been informed by dominant cultural and religious worldviews, particularly those grounded in notions of human exceptionalism and control over nature. Carlen, Sherman and Domingo all brought up how these values shaped early policies that framed predators as threats to be removed rather than species to be understood or respected. In California, this worldview contributed not only to the widespread killing of wolves, bears and cougars but also to the displacement of American Indian communities whose land-based practices and beliefs conflicted with these approaches. A male peacock makes its way past Ian Choi, 21 months old, standing in front of his home on Altura Road in Arcadia. (Mel Melcon / Los Angeles Times) Wildlife management in California, specifically, has long been shaped by these same forces of violence, originating in bounty campaigns not just against predators like cougars and wolves but also against American Indian peoples. These intertwined legacies of removal, extermination and land seizure continue to influence how certain animals and communities are perceived and treated today.For Alan Salazar, a tribal elder with the Fernandeño Tataviam Band of Mission Indians, those legacies run deep. “What happened to native peoples happened to our large predators in California,” he said. “Happened to our plant relatives.” Reflecting on the genocide of Indigenous Californians and the coordinated extermination of grizzly bears, wolves and mountain lions, Salazar sees a clear parallel.“There were three parts to our world — the humans, the animals and the plants,” he explained. “We were all connected. We respected all of them.” Salazar explains that his people’s relationship with the land, animals and plants is itself a form of religion, one grounded in ceremony, reciprocity and deep respect. Salazar said his ancestors lived in harmony with mountain lions for over 10,000 years, not by eliminating them but by learning from them. Other predators — cougars, bears, coyotes and wolves — were also considered teachers, honored through ceremony and studied for their power and intelligence. “Maybe we had a better plan on how to live with mountain lions, wolves and bears,” he said. “Maybe you should look at tribal knowledge.”He views the Wallis Annenberg Wildlife Crossing — for which he is a Native American consultant — as a cultural opportunity. “It’s not just for mountain lions,” he said. “It’s for all animals. And that’s why I wanted to be involved.” He believes the project has already helped raise awareness and shift perceptions about coexistence and planning, and hopes that it will help native plants, animals and peoples.As L.A. continues to grapple with the future of wildlife in its neighborhoods, canyons and corridors, Salazar and others argue that it is an opportunity to rethink the cultural frameworks, governance systems and historical injustices that have long shaped human-animal relations in the city. Whether through policy reform, neighborhood education or sacred ceremony, residents need reminders that evolutionary futures are being shaped not only in forests and preserves but right here, across freeways, backyards and local council meetings. The Wallis Annenberg Wildlife Crossing under construction over the 101 Freeway near Liberty Canyon Road in Agoura Hills on July 12, 2024. (Myung J. Chun / Los Angeles Times) The research makes clear that wildlife is not simply adapting to urban environments in isolation; it is adapting to a range of factors, including policing, architecture and neighborhood design. Carlen believes this opens a crucial frontier for interdisciplinary research, especially in cities like Los Angeles, where uneven geographies, biodiversity and political decisions intersect daily. “I think there’s a lot of injustice in cities that are happening to both humans and wildlife,” she said. “And I think the potential is out there for justice to be brought to both of those things.”

Something Strange Is Happening to Tomatoes Growing on the Galápagos Islands

Scientists say wild tomato plants on the archipelago's western islands are experiencing "reverse evolution" and reverting back to ancestral traits

Something Strange Is Happening to Tomatoes Growing on the Galápagos Islands Scientists say wild tomato plants on the archipelago’s western islands are experiencing “reverse evolution” and reverting back to ancestral traits Sarah Kuta - Daily Correspondent July 9, 2025 4:29 p.m. Scientists are investigating the production of ancestral alkaloids by tomatoes in the Galápagos Islands. Adam Jozwiak / University of California, Riverside Some tomatoes growing on the Galápagos Islands appear to be going back in time by producing the same toxins their ancestors did millions of years ago. Scientists describe this development—a controversial process known as “reverse evolution”—in a June 18 paper published in the journal Nature Communications. Tomatoes are nightshades, a group of plants that also includes eggplants, potatoes and peppers. Nightshades, also known as Solanaceae, produce bitter compounds called alkaloids, which help fend off hungry bugs, animals and fungi. When plants produce alkaloids in high concentrations, they can sicken the humans who eat them. To better understand alkaloid synthesis, researchers traveled to the Galápagos Islands, the volcanic chain roughly 600 miles off the coast of mainland Ecuador made famous by British naturalist Charles Darwin. They gathered and studied more than 30 wild tomato plants growing in different places on various islands. The Galápagos tomatoes are the descendents of plants from South America that were probably carried to the archipelago by birds. The team’s analyses revealed that the tomatoes growing on the eastern islands were behaving as expected, by producing alkaloids that are similar to those found in modern, cultivated varieties. But those growing on the western islands, they found, were creating alkaloids that were more closely related to those produced by eggplants millions of years ago. Tomatoes growing on the western islands (shown here) are producing ancestral alkaloids.  Adam Jozwiak / University of California, Riverside Researchers suspect the environment may be responsible for the plants’ unexpected return to ancestral alkaloids. The western islands are much younger than the eastern islands, so the soil is less developed and the landscape is more barren. To survive in these harsh conditions, perhaps it was advantageous for the tomato plants to revert back to older alkaloids, the researchers posit. “The plants may be responding to an environment that more closely resembles what their ancestors faced,” says lead author Adam Jozwiak, a biochemist at the University of California, Riverside, to BBC Wildlife’s Beki Hooper. However, for now, this is just a theory. Scientists say they need to conduct more research to understand why tomato plants on the western islands have adapted this way. Scientists were able to uncover the underlying molecular mechanisms at play: Four amino acids in a single enzyme appear to be responsible for the reversion back to the ancestral alkaloids, they found. They also used evolutionary modeling to confirm the direction of the adaptation—that is, that the tomatoes on the western islands had indeed returned to an earlier, ancestral state. Among evolutionary biologists, “reverse evolution” is somewhat contentious. The commonly held belief is that evolution marches forward, not backward. It’s also difficult to prove an organism has reverted back to an older trait through the same genetic pathways. But, with the new study, researchers say they’ve done exactly that. “Some people don’t believe in this,” says Jozwiak in a statement. “But the genetic and chemical evidence points to a return to an ancestral state. The mechanism is there. It happened.” So, if “reverse evolution” happened in wild tomatoes, could something similar happen in humans? In theory, yes, but it would take a long time, Jozwiak says. “If environmental conditions shifted dramatically over long timescales, it’s possible that traits from our distant past could re-emerge, but whether that ever happens is highly uncertain,” Jozwiak tells Newsweek’s Daniella Gray. “It’s speculative and would take millions of years, if at all.” Get the latest stories in your inbox every weekday.

Lifesize herd of puppet animals begins climate action journey from Africa to Arctic Circle

The Herds project from the team behind Little Amal will travel 20,000km taking its message on environmental crisis across the worldHundreds of life-size animal puppets have begun a 20,000km (12,400 mile) journey from central Africa to the Arctic Circle as part of an ambitious project created by the team behind Little Amal, the giant puppet of a Syrian girl that travelled across the world.The public art initiative called The Herds, which has already visited Kinshasa and Lagos, will travel to 20 cities over four months to raise awareness of the climate crisis. Continue reading...

Hundreds of life-size animal puppets have begun a 20,000km (12,400 mile) journey from central Africa to the Arctic Circle as part of an ambitious project created by the team behind Little Amal, the giant puppet of a Syrian girl that travelled across the world.The public art initiative called The Herds, which has already visited Kinshasa and Lagos, will travel to 20 cities over four months to raise awareness of the climate crisis.It is the second major project from The Walk Productions, which introduced Little Amal, a 12-foot puppet, to the world in Gaziantep, near the Turkey-Syria border, in 2021. The award-winning project, co-founded by the Palestinian playwright and director Amir Nizar Zuabi, reached 2 million people in 17 countries as she travelled from Turkey to the UK.The Herds’ journey began in Kinshasa’s Botanical Gardens on 10 April, kicking off four days of events. It moved on to Lagos, Nigeria, the following week, where up to 5,000 people attended events performed by more than 60 puppeteers.On Friday the streets of Dakar in Senegal will be filled with more than 40 puppet zebras, wildebeest, monkeys, giraffes and baboons as they run through Médina, one of the busiest neighbourhoods, where they will encounter a creation by Fabrice Monteiro, a Belgium-born artist who lives in Senegal, and is known for his large-scale sculptures. On Saturday the puppets will be part of an event in the fishing village of Ngor.The Herds’ 20,000km journey began in Kinshasa, the Democratic Republic of the Congo. Photograph: Berclaire/walk productionsThe first set of animal puppets was created by Ukwanda Puppetry and Designs Art Collective in Cape Town using recycled materials, but in each location local volunteers are taught how to make their own animals using prototypes provided by Ukwanda. The project has already attracted huge interest from people keen to get involved. In Dakar more than 300 artists applied for 80 roles as artists and puppet guides. About 2,000 people will be trained to make the puppets over the duration of the project.“The idea is that we’re migrating with an ever-evolving, growing group of animals,” Zuabi told the Guardian last year.Zuabi has spoken of The Herds as a continuation of Little Amal’s journey, which was inspired by refugees, who often cite climate disaster as a trigger for forced migration. The Herds will put the environmental emergency centre stage, and will encourage communities to launch their own events to discuss the significance of the project and get involved in climate activism.The puppets are created with recycled materials and local volunteers are taught how to make them in each location. Photograph: Ant Strack“The idea is to put in front of people that there is an emergency – not with scientific facts, but with emotions,” said The Herds’ Senegal producer, Sarah Desbois.She expects thousands of people to view the four events being staged over the weekend. “We don’t have a tradition of puppetry in Senegal. As soon as the project started, when people were shown pictures of the puppets, they were going crazy.”Little Amal, the puppet of a Syrian girl that has become a symbol of human rights, in Santiago, Chile on 3 January. Photograph: Anadolu/Getty ImagesGrowing as it moves, The Herds will make its way from Dakar to Morocco, then into Europe, including London and Paris, arriving in the Arctic Circle in early August.

Dead, sick pelicans turning up along Oregon coast

So far, no signs of bird flu but wildlife officials continue to test the birds.

Sick and dead pelicans are turning up on Oregon’s coast and state wildlife officials say they don’t yet know why. The Oregon Department of Fish and Wildlife says it has collected several dead brown pelican carcasses for testing. Lab results from two pelicans found in Newport have come back negative for highly pathogenic avian influenza, also known as bird flu, the agency said. Avian influenza was detected in Oregon last fall and earlier this year in both domestic animals and wildlife – but not brown pelicans. Additional test results are pending to determine if another disease or domoic acid toxicity caused by harmful algal blooms may be involved, officials said. In recent months, domoic acid toxicity has sickened or killed dozens of brown pelicans and numerous other wildlife in California. The sport harvest for razor clams is currently closed in Oregon – from Cascade Head to the California border – due to high levels of domoic acid detected last fall.Brown pelicans – easily recognized by their large size, massive bill and brownish plumage – breed in Southern California and migrate north along the Oregon coast in spring. Younger birds sometimes rest on the journey and may just be tired, not sick, officials said. If you find a sick, resting or dead pelican, leave it alone and keep dogs leashed and away from wildlife. State wildlife biologists along the coast are aware of the situation and the public doesn’t need to report sick, resting or dead pelicans. — Gosia Wozniacka covers environmental justice, climate change, the clean energy transition and other environmental issues. Reach her at gwozniacka@oregonian.com or 971-421-3154.Our journalism needs your support. Subscribe today to OregonLive.com.

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