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In Rural Pennsylvania, Crypto Mining Offers a Lifeline for Dying Gas Wells

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Monday, June 3, 2024

Holly May first heard the roaring noise during a youth hunting event on state game lands in the fall of 2022.  “It’s back a ways,” May said of the noise. “It was an area that I previously had liked to hunt in.” The plot of land, State Game Lands 44 in Pennsylvania’s northwest, was once home to a coal mine — since revegetated with native and pollinator-friendly plants and stocked with pheasants by the Pennsylvania Game Commission. Today, traces of its mining past are covered by tall, waving grasses and clusters of goldenrod flowers. Getting to the site requires maneuvering up a treacherous gravel hill road and past a gate with a sign identifying the lessee of its mineral rights: Diversified Production LLC. Where the trees clear, grassland opens up, offering cover to the critters that May and others both hunt and protect. But that fall day, finding pheasants was harder than usual. “It literally sound[ed] like you’re standing beside an airplane taking off,” she said. May, a natural resources professional, wouldn’t find out until months later that the sound was coming from a different kind of mining operation than this land has grown accustomed to — one that searches for bitcoin.  The bitcoin mine sits atop a set of wells producing natural gas that — rather than being transported and sold — can be used to power banks of supercomputers that work around the clock to unlock cryptocurrency, a lucrative process. Today, one bitcoin is worth around $67,000. Diversified Production’s crypto mining operation at Longhorn Pad A in Elk County, PA. When May heard it roaring that day, the mine was up and running but without authorization from state regulators. The oil and gas producer Diversified had yet to secure the required permits to hook up the engines that power cryptocurrency mining on the low-producing fracking well pad, called Longhorn Pad A. Nonetheless, it ran for several weeks, one resident estimated.  Pennsylvania’s Department of Environmental Protection (DEP) later slapped the company with a notice of violation for breaking state air pollution and noise laws.  Then, without handing down any punishment, the regulators approved the mining operation in December. The mine was the second Diversified site to be hit with a violation for operating without a permit. The agency did so as well at a neighboring site, Longhorn Pad C, which regulators discovered in March 2023. It also received the necessary permits for bitcoin mining two months later. Diversified, which has acquired some 70,000 wells in less than a decade, has surpassed Exxon Mobil Corp. to become the largest well owner in the nation. Many of these wells are low-producing and represent a risk if the company can’t afford to plug them at the end of their lives. The situation adds to the growing concern about a potential surge in bitcoin mining — and its potential to increase air pollution — throughout Pennsylvania. Across the country, crypto mining is blamed for producing millions of tons of carbon dioxide and consuming vast amounts of electricity — more than some entire countries. “We have invested tens of thousands of dollars in habitat work on that game lands,” May said. “Now, it’s really disturbing to use that whole back section … not to mention the greenhouse gas emissions.”  In issuing permits for the site, the DEP opted not to put a cap on its greenhouse gas emissions, noting that the site is not a “major” source of emissions relative to other polluters in the state, such as power plants. But the department did place a noise limit on the mine, even though Horton Township, where the mine is located, had already adopted a bitcoin mining ordinance that limited noise. PJ Piccirillo, a supervisor in Horton Township, said he was never contacted by Diversified Energy about the site throughout the entire permitting process. The agency also forgave the company’s infractions in granting the permit, saying that Diversified had “satisfactorily addressed violations.” In an email to Capital & Main, the DEP said Diversified has not yet started full-time operation of the bitcoin mine at Longhorn A because it has yet to install the “sound mitigation devices” its permit requires. The bitcoin operations point to a gap in regulatory oversight that has allowed operators such as Diversified to start their mining operations without being fully transparent about their full plans or communicating with local communities about the potential impact of their operations, interviews and government emails obtained through Right-to-Know requests show. Regulators often lack the bandwidth to properly monitor all infractions, especially in rural areas, and oversight can be fractured — in the case of Longhorn Pad A, requiring input from three different agencies that don’t often communicate with one another. “The permit applicant here has a bad track record in Pennsylvania,” said Robert Routh, Pennsylvania’s senior policy advocate for the Natural Resources Defense Council (NRDC), which filed a complaint opposing the mine last July alongside Earthjustice and the Clean Air Council.  “It appears they lack both the intent or the ability to comply with Pennsylvania law.” From Bituminous to Bitcoin In a process known as “wellhead mining,” Diversified’s Longhorn Pad A funnels natural gas from two fracking wells directly into engines that power banks of supercomputers. Disconnected from the grid, the mine can churn away on its own around the clock. Diversified hadn’t owned the pad for very long before it took steps to turn it into a bitcoin mine. The company acquired the wells in November 2020 and formally applied to mine bitcoin there in June 2022. It powered up the mines the following October and operated for several weeks, according to resident complaints and emails reviewed by Capital & Main.  As the DEP’s permitting process was underway, staff at the Pennsylvania Game Commission expressed frustration that Diversified was not fully answering inquiries about their activities at the well site. Though the company’s permit applications on Longhorn Pads A and C clearly expressed its intent to mine bitcoin, early emails obtained by Capital & Main show company representatives were vague in communicating their plans to both agencies, referring to the mine as “containers” housing “computer equipment.” After finally meeting with the Game Commission, a Diversified executive offered to “partner” on projects for the agency, such as tree planting efforts and winter coat drives.  Both well pads house marginal, or low-producing, wells, which Diversified acquired from Pittsburgh-based fracking giant EQT in 2020. The wells had been inactive for around a decade before Diversified brought them back to life.  A highly energy-intensive process, bitcoin mining runs the risk of producing a surge in the state’s greenhouse gas emissions. Using what’s called the proof-of-work algorithm, bitcoin miners mint new coins by chipping away at complex mathematical equations. A September 2022 report from the Biden administration estimates that crypto operations are now responsible for 0.4% to 0.8% of the nation’s total greenhouse gas emissions. Bitcoin mining also generates localized air and water pollution as well as electronic waste, the report notes. Cooling the computers, which must remain at a set temperature, also requires vast water usage, which could strain drought-prone areas. Emissions projections for Longhorn Pad A from Diversified’s permit application. In its application for permits to add crypto-related generators to Longhorn A, Diversified predicted the site’s emissions of air pollutants, such as particulate matter and volatile organic compounds, would multiply by as much as 67 times once it began mining bitcoin.  Wells such as Longhorn A — which for most operators would be economically worthless since they lack pipeline capacity to transmit any gas they produce — are a model for giving new life to aging wells. Bitcoin mining offers them a new revenue stream and, as one bitcoin mine operator wrote in a 2023 blog post, going off-grid comes with a suite of “superpowers,” including the ability to relocate quickly and to “operate permissionlessly.”  The specter of a bitcoin gold rush in Pennsylvania seems to have caught regulators by surprise, interviews and documents obtained via Right-to-Know requests show. Thousands of low-producing wells are estimated to be scattered across the commonwealth, and environmentalists fear they could become targets for an emerging, hard-to-control industry.  ‘Big Picture, We Don’t Ever Want to See Another One of These’ In Horton Township, Piccirillo said he first heard complaints from residents in the fall of 2022. At first he couldn’t explain the noise or the sudden increase in truck traffic on the road leading to the well. That is, until he and his fellow supervisors went to the site to see for themselves. The bitcoin mine was up and running on his first visit, shut off on his second, he said.  Minutes from Horton Township Board of Supervisors meetings show the mine came up repeatedly between August and October of 2022. Around a year later, the township passed an ordinance requiring that, before operating, bitcoin mines be housed in a “fully enclosed” building that would keep noise emissions below 50 decibels (roughly the noise level of a refrigerator) from the closest property line; and receive approval through a local permitting process. After visiting the site this past March, Piccirillo said the company still had not enclosed the mine in a soundproof building. The road in Weedville, PA, just a few miles from Longhorn Pad C. Around the same time that Piccirillo began fielding resident complaints, Dave Gustafson, director for the Bureau of Wildlife Habitat Management at the Pennsylvania Game Commission, started looking for answers as well. At first, none came. “We went back and forth, and over the next several months throughout the summer [of 2022], tried to reach out and find out, ‘Well, what are they exactly doing?’” he said. “They really didn’t tell us.” Gustafson recalled that early correspondence from company representatives was vague. “They were very careful to say that what they were doing had to do with production and post-production of gas,” he said. “That’s careful language.”  The company took a similar tack in corresponding with the DEP. In April 2023, after the DEP hit Diversified with a violation for firing up its bitcoin mine on Longhorn C without permission, a company vice president pushed back. “We do not agree with this determination,” the executive wrote in an email, arguing that the engines at the site actually “provide power for oil and gas operations.” (The engines Diversified were cited for using are the same models the company noted in its permit application would be “associated with mining of crypto currency operations.”)  Meanwhile, emails show Diversified was slow to reply to agency queries, sometimes delaying answers to questions and plans to meet by weeks. An internal Game Commission memo noted that Gustafson emailed Diversified “requesting details of what was being developed on the Longhorn A pad” on Sept. 1, 2022. More than four months later, the memo said, “We had still not received a written response and only managed to get 1 phone conversation.”  Diversified’s notice of violation from the state’s Department of Environmental Protection. As the bitcoin mines began operating, the Game Commission fielded its first complaints. The situation presented a quandary for the state’s regulatory bodies, which appeared not to have communicated with each other about their shared experience with Diversified until July of 2023, records show. When a third agency — the Department of Conservation and Natural Resources — weighed in, another point of view emerged. “Our position is that [bitcoin mining] is certainly not permissible under our lease,” the department wrote in emails obtained by Capital & Main. It took months for Gustafson to get the chance to arrange a visit to Longhorn A with Diversified representatives, because the company didn’t offer “a lot of good-natured or good partnerly communication,” he recalled last October. “We disagree, still to this day, about certain rights that they assert that they have, that we don’t believe that they have.”  “Big picture,” he continued, “we don’t ever want to see another one of these. We don’t even want this one there.”  Gustafson concedes that since getting in touch with Diversified’s staff, the company has agreed to several key compromises — including shutting down the bitcoin mine on peak hunting days. Emails also show that, after meeting with Gustafson, in the wake of months of delay, Diversified Chief Financial Officer Brad Gray offered to “partner with your organization to get some great projects completed,” highlighting that the company had previously sponsored tree-planting initiatives, fishing explorations, playground construction projects and winter coat drives for other entities.  The violations at the two Longhorn pads tops a list of 19 others the company admitted to in its permit applications for the Longhorn sites. Those violations should have been enough to derail Diversified’s application to mine bitcoin, Routh, the NRDC policy advocate, and the nonprofit environmental groups Clean Air Council and Earthjustice said in a public comment filed in opposition to the mine. In response, the DEP said that “Diversified had worked with DEP to satisfactorily address violations occurring at other facilities the company operates.” They did not specify what steps the company had taken.  “The department offers a get-out-of-jail free card to Diversified and to any other polluters who don’t bother to apply for a permit,” Charley McPhedran, senior attorney in Earthjustice’s clean energy program, told Capital & Main. “The incentive for industry is to do whatever it wants.”  Capital & Main reached out to Diversified Energy PLC, the parent company to Diversified Production, with a list of questions. While it did not respond to specific questions, it offered a statement in response.  Fog hangs on the hillsides above the road to Longhorn Pad C. “As part of our well optimization efforts, we undertook a pilot research program to study on-site cryptocurrency mining activities as a solution for stranded assets. Throughout the process, we have sought guidance and worked closely with the Department of Environmental Protection and Game Commission,” the statement reads. “Across our operations, we strive to be good stewards of our assets, focused on innovative solutions to best use resources while minimizing environmental impact and improving performance.”  The Department of Environmental Protection did not respond to a list of questions from Capital & Main.  For May, the hunter who has now stopped frequenting State Game Lands 44 in favor of quieter grounds, this type of operation has real-life consequences.  “​​It’s super frustrating to watch a private company come in and be a repeat offender,” said May.  Copyright Capital & Main

Emails show Diversified largely kept the state in the dark as it fired up its bitcoin mining operation. The post In Rural Pennsylvania, Crypto Mining Offers a Lifeline for Dying Gas Wells appeared first on .

Holly May first heard the roaring noise during a youth hunting event on state game lands in the fall of 2022. 

“It’s back a ways,” May said of the noise. “It was an area that I previously had liked to hunt in.” The plot of land, State Game Lands 44 in Pennsylvania’s northwest, was once home to a coal mine — since revegetated with native and pollinator-friendly plants and stocked with pheasants by the Pennsylvania Game Commission. Today, traces of its mining past are covered by tall, waving grasses and clusters of goldenrod flowers.

Getting to the site requires maneuvering up a treacherous gravel hill road and past a gate with a sign identifying the lessee of its mineral rights: Diversified Production LLC. Where the trees clear, grassland opens up, offering cover to the critters that May and others both hunt and protect.

But that fall day, finding pheasants was harder than usual. “It literally sound[ed] like you’re standing beside an airplane taking off,” she said.

May, a natural resources professional, wouldn’t find out until months later that the sound was coming from a different kind of mining operation than this land has grown accustomed to — one that searches for bitcoin. 

The bitcoin mine sits atop a set of wells producing natural gas that — rather than being transported and sold — can be used to power banks of supercomputers that work around the clock to unlock cryptocurrency, a lucrative process. Today, one bitcoin is worth around $67,000.

Diversified Production’s crypto mining operation at Longhorn Pad A in Elk County, PA.

When May heard it roaring that day, the mine was up and running but without authorization from state regulators. The oil and gas producer Diversified had yet to secure the required permits to hook up the engines that power cryptocurrency mining on the low-producing fracking well pad, called Longhorn Pad A. Nonetheless, it ran for several weeks, one resident estimated. 

Pennsylvania’s Department of Environmental Protection (DEP) later slapped the company with a notice of violation for breaking state air pollution and noise laws. 

Then, without handing down any punishment, the regulators approved the mining operation in December.

The mine was the second Diversified site to be hit with a violation for operating without a permit. The agency did so as well at a neighboring site, Longhorn Pad C, which regulators discovered in March 2023. It also received the necessary permits for bitcoin mining two months later. Diversified, which has acquired some 70,000 wells in less than a decade, has surpassed Exxon Mobil Corp. to become the largest well owner in the nation. Many of these wells are low-producing and represent a risk if the company can’t afford to plug them at the end of their lives.

The situation adds to the growing concern about a potential surge in bitcoin mining — and its potential to increase air pollution — throughout Pennsylvania. Across the country, crypto mining is blamed for producing millions of tons of carbon dioxide and consuming vast amounts of electricity — more than some entire countries.

“We have invested tens of thousands of dollars in habitat work on that game lands,” May said. “Now, it’s really disturbing to use that whole back section … not to mention the greenhouse gas emissions.” 

In issuing permits for the site, the DEP opted not to put a cap on its greenhouse gas emissions, noting that the site is not a “major” source of emissions relative to other polluters in the state, such as power plants. But the department did place a noise limit on the mine, even though Horton Township, where the mine is located, had already adopted a bitcoin mining ordinance that limited noise. PJ Piccirillo, a supervisor in Horton Township, said he was never contacted by Diversified Energy about the site throughout the entire permitting process.

The agency also forgave the company’s infractions in granting the permit, saying that Diversified had “satisfactorily addressed violations.”

In an email to Capital & Main, the DEP said Diversified has not yet started full-time operation of the bitcoin mine at Longhorn A because it has yet to install the “sound mitigation devices” its permit requires.

The bitcoin operations point to a gap in regulatory oversight that has allowed operators such as Diversified to start their mining operations without being fully transparent about their full plans or communicating with local communities about the potential impact of their operations, interviews and government emails obtained through Right-to-Know requests show. Regulators often lack the bandwidth to properly monitor all infractions, especially in rural areas, and oversight can be fractured — in the case of Longhorn Pad A, requiring input from three different agencies that don’t often communicate with one another.

“The permit applicant here has a bad track record in Pennsylvania,” said Robert Routh, Pennsylvania’s senior policy advocate for the Natural Resources Defense Council (NRDC), which filed a complaint opposing the mine last July alongside Earthjustice and the Clean Air Council. 

“It appears they lack both the intent or the ability to comply with Pennsylvania law.”

From Bituminous to Bitcoin

In a process known as “wellhead mining,” Diversified’s Longhorn Pad A funnels natural gas from two fracking wells directly into engines that power banks of supercomputers. Disconnected from the grid, the mine can churn away on its own around the clock.

Diversified hadn’t owned the pad for very long before it took steps to turn it into a bitcoin mine. The company acquired the wells in November 2020 and formally applied to mine bitcoin there in June 2022. It powered up the mines the following October and operated for several weeks, according to resident complaints and emails reviewed by Capital & Main. 

As the DEP’s permitting process was underway, staff at the Pennsylvania Game Commission expressed frustration that Diversified was not fully answering inquiries about their activities at the well site. Though the company’s permit applications on Longhorn Pads A and C clearly expressed its intent to mine bitcoin, early emails obtained by Capital & Main show company representatives were vague in communicating their plans to both agencies, referring to the mine as “containers” housing “computer equipment.” After finally meeting with the Game Commission, a Diversified executive offered to “partner” on projects for the agency, such as tree planting efforts and winter coat drives. 

Both well pads house marginal, or low-producing, wells, which Diversified acquired from Pittsburgh-based fracking giant EQT in 2020. The wells had been inactive for around a decade before Diversified brought them back to life. 

A highly energy-intensive process, bitcoin mining runs the risk of producing a surge in the state’s greenhouse gas emissions. Using what’s called the proof-of-work algorithm, bitcoin miners mint new coins by chipping away at complex mathematical equations. A September 2022 report from the Biden administration estimates that crypto operations are now responsible for 0.4% to 0.8% of the nation’s total greenhouse gas emissions. Bitcoin mining also generates localized air and water pollution as well as electronic waste, the report notes. Cooling the computers, which must remain at a set temperature, also requires vast water usage, which could strain drought-prone areas.

Emissions projections for Longhorn Pad A from Diversified’s permit application.


In its
application for permits to add crypto-related generators to Longhorn A, Diversified predicted the site’s emissions of air pollutants, such as particulate matter and volatile organic compounds, would multiply by as much as 67 times once it began mining bitcoin. 

Wells such as Longhorn A — which for most operators would be economically worthless since they lack pipeline capacity to transmit any gas they produce — are a model for giving new life to aging wells. Bitcoin mining offers them a new revenue stream and, as one bitcoin mine operator wrote in a 2023 blog post, going off-grid comes with a suite of “superpowers,” including the ability to relocate quickly and to “operate permissionlessly.” 

The specter of a bitcoin gold rush in Pennsylvania seems to have caught regulators by surprise, interviews and documents obtained via Right-to-Know requests show. Thousands of low-producing wells are estimated to be scattered across the commonwealth, and environmentalists fear they could become targets for an emerging, hard-to-control industry. 

‘Big Picture, We Don’t Ever Want to See Another One of These’

In Horton Township, Piccirillo said he first heard complaints from residents in the fall of 2022. At first he couldn’t explain the noise or the sudden increase in truck traffic on the road leading to the well. That is, until he and his fellow supervisors went to the site to see for themselves. The bitcoin mine was up and running on his first visit, shut off on his second, he said. 

Minutes from Horton Township Board of Supervisors meetings show the mine came up repeatedly between August and October of 2022. Around a year later, the township passed an ordinance requiring that, before operating, bitcoin mines be housed in a “fully enclosed” building that would keep noise emissions below 50 decibels (roughly the noise level of a refrigerator) from the closest property line; and receive approval through a local permitting process. After visiting the site this past March, Piccirillo said the company still had not enclosed the mine in a soundproof building.

The road in Weedville, PA, just a few miles from Longhorn Pad C.

Around the same time that Piccirillo began fielding resident complaints, Dave Gustafson, director for the Bureau of Wildlife Habitat Management at the Pennsylvania Game Commission, started looking for answers as well. At first, none came. “We went back and forth, and over the next several months throughout the summer [of 2022], tried to reach out and find out, ‘Well, what are they exactly doing?’” he said. “They really didn’t tell us.”

Gustafson recalled that early correspondence from company representatives was vague. “They were very careful to say that what they were doing had to do with production and post-production of gas,” he said. “That’s careful language.” 

The company took a similar tack in corresponding with the DEP. In April 2023, after the DEP hit Diversified with a violation for firing up its bitcoin mine on Longhorn C without permission, a company vice president pushed back. “We do not agree with this determination,” the executive wrote in an email, arguing that the engines at the site actually “provide power for oil and gas operations.” (The engines Diversified were cited for using are the same models the company noted in its permit application would be “associated with mining of crypto currency operations.”) 

Meanwhile, emails show Diversified was slow to reply to agency queries, sometimes delaying answers to questions and plans to meet by weeks. An internal Game Commission memo noted that Gustafson emailed Diversified “requesting details of what was being developed on the Longhorn A pad” on Sept. 1, 2022. More than four months later, the memo said, “We had still not received a written response and only managed to get 1 phone conversation.” 

Diversified’s notice of violation from the state’s Department of Environmental Protection.

As the bitcoin mines began operating, the Game Commission fielded its first complaints.

The situation presented a quandary for the state’s regulatory bodies, which appeared not to have communicated with each other about their shared experience with Diversified until July of 2023, records show. When a third agency — the Department of Conservation and Natural Resources — weighed in, another point of view emerged. “Our position is that [bitcoin mining] is certainly not permissible under our lease,” the department wrote in emails obtained by Capital & Main.

It took months for Gustafson to get the chance to arrange a visit to Longhorn A with Diversified representatives, because the company didn’t offer “a lot of good-natured or good partnerly communication,” he recalled last October. “We disagree, still to this day, about certain rights that they assert that they have, that we don’t believe that they have.” 

“Big picture,” he continued, “we don’t ever want to see another one of these. We don’t even want this one there.” 

Gustafson concedes that since getting in touch with Diversified’s staff, the company has agreed to several key compromises — including shutting down the bitcoin mine on peak hunting days. Emails also show that, after meeting with Gustafson, in the wake of months of delay, Diversified Chief Financial Officer Brad Gray offered to “partner with your organization to get some great projects completed,” highlighting that the company had previously sponsored tree-planting initiatives, fishing explorations, playground construction projects and winter coat drives for other entities. 

The violations at the two Longhorn pads tops a list of 19 others the company admitted to in its permit applications for the Longhorn sites. Those violations should have been enough to derail Diversified’s application to mine bitcoin, Routh, the NRDC policy advocate, and the nonprofit environmental groups Clean Air Council and Earthjustice said in a public comment filed in opposition to the mine.

In response, the DEP said that “Diversified had worked with DEP to satisfactorily address violations occurring at other facilities the company operates.” They did not specify what steps the company had taken. 

“The department offers a get-out-of-jail free card to Diversified and to any other polluters who don’t bother to apply for a permit,” Charley McPhedran, senior attorney in Earthjustice’s clean energy program, told Capital & Main. “The incentive for industry is to do whatever it wants.” 

Capital & Main reached out to Diversified Energy PLC, the parent company to Diversified Production, with a list of questions. While it did not respond to specific questions, it offered a statement in response. 

Fog hangs on the hillsides above the road to Longhorn Pad C.

“As part of our well optimization efforts, we undertook a pilot research program to study on-site cryptocurrency mining activities as a solution for stranded assets. Throughout the process, we have sought guidance and worked closely with the Department of Environmental Protection and Game Commission,” the statement reads. “Across our operations, we strive to be good stewards of our assets, focused on innovative solutions to best use resources while minimizing environmental impact and improving performance.” 

The Department of Environmental Protection did not respond to a list of questions from Capital & Main. 

For May, the hunter who has now stopped frequenting State Game Lands 44 in favor of quieter grounds, this type of operation has real-life consequences. 

“​​It’s super frustrating to watch a private company come in and be a repeat offender,” said May. 


Copyright Capital & Main

Read the full story here.
Photos courtesy of

Battery electric cars will overtake diesels in Great Britain by 2030, analysis suggests

London predicted to be the first UK city to go diesel-free, largely because of the ultra-low emission zoneBattery electric cars are poised to overtake diesels on Great Britain’s roads by 2030, according to analysis that suggests London will be the first UK city to go diesel-free.The number of diesel cars on Great Britain’s roads in June had fallen to 9.9m in June last year, 21% below its peak of 12.4m vehicles, according to analysis by New AutoMotive, a thinktank focused on the transition to electric cars. Electric car sales are still growing rapidly, albeit more slowly than manufacturers had expected. Continue reading...

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Food becoming more calorific but less nutritious due to rising carbon dioxide

Researchers noticed ‘dramatic’ changes in nutrients in crops, including drop in zinc and rise in leadMore carbon dioxide in the environment is making food more calorific but less nutritious – and also potentially more toxic, a study has found.Sterre ter Haar, a lecturer at Leiden University in the Netherlands, and other researchers at the institution created a method to compare multiple studies on plants’ responses to increased CO2 levels. The results, she said, were a shock: although crop yields increase, they become less nutrient-dense. While zinc levels in particular drop, lead levels increase. Continue reading...

More carbon dioxide in the environment is making food more calorific but less nutritious – and also potentially more toxic, a study has found.Sterre ter Haar, a lecturer at Leiden University in the Netherlands, and other researchers at the institution created a method to compare multiple studies on plants’ responses to increased CO2 levels. The results, she said, were a shock: although crop yields increase, they become less nutrient-dense. While zinc levels in particular drop, lead levels increase.“Seeing how dramatic some of the nutritional changes were, and how this differed across plants, was a big surprise,” she told the Guardian. “We aren’t seeing a simple dilution effect but rather a complete shift in the composition of our foods … This also raises the question of whether we should adjust our diets in some way, or how we grow or produce our food.”While scientists have been looking at the effects of more CO2 in the atmosphere on plants for a decade, their work has been difficult to compare. The new research established a baseline measurement derived from the observation that the gas appears to have a linear effect on growth, meaning that if the CO2 level doubles, so does the effect on nutrients. This made it possible to compare almost 60,000 measurements across 32 nutrients and 43 crops, including rice, potatoes, tomatoes and wheat.“Although there was a lot of data from previous studies, there were few answers,” said Ter Haar. “These studies used paired experiments, where plants were grown under identical conditions except for one thing: the CO2 level. This gives insight into possible changes, but the sample sizes were usually too small to draw conclusions from. Comparing these individual studies with each other was difficult because, as we know, the baseline of CO2 is continuously increasing in our atmosphere, meaning that the baseline in these experiments is also increasing.”Their “baseline” measurement was a gas concentration of 350 parts per million – sometimes referred to as the last “safe” level. They compared this with a concentration of 550 parts per million, which some scientists expect to be reached by 2065. Most nutrients would respond negatively to the rise in concentration, they said, with an average drop of 3.2%.However, zinc in chickpeas would be expected to plummet by up to 37.5%, with a “significant” decrease in protein, zinc and iron in essential crops such as rice and wheat. The researchers warned of “devastating health consequences” including “hidden hunger, where people have sufficient food calorically but insufficient nutrients”.The CO2 level is now 425.2 parts per million, the paper said, which had already resulted in “lowered levels of plant nutrition due to CO2 rise”.The study is part of a growing body of research on the impact of climate breakdown on crops, not only outdoors but also in artificial conditions. The Netherlands is one of the world’s largest agricultural exporters, with three-quarters of its production for export and more than 4,100 hectares of greenhouses, where crops are grown in CO2-enriched environments to increase the yield.“Climate change isn’t a faraway problem,” said Ter Haar. “The effects are already on our dinner plate.”Other experts welcomed the Dutch study, saying it was a good basis for further investigation. Courtney Leisner, an assistant professor at the school of plant and environmental sciences at Virginia Tech in the US, coauthored a study earlier this year on how crop improvement strategies could counteract the negative effects of CO2 on crop quality. “This study offers critical insights into how environmental conditions affect crop nutritional quality, which is essential for sustaining future food security,” she said.There are, however, other factors such as fertiliser application that play an important role in how nutritious our crops are, said Jan Verhagen, a researcher on climate change and sustainable agriculture at Wageningen University.“Indeed, nutrient levels in plants are changing,” he said. “Whether this is only related to CO2 is, I believe, less clear … we know that nutrition is a key factor in food security and health in general, so it makes sense to shift the focus on this topic.”He said more experiments would be needed to help design breeding programmes for crops with certain nutrient levels under different environmental stresses to better understand the effects of agricultural practices.The meta-analysis raises as many questions as it answers, said Ter Haar – who wants to do further study on climate change and nutrients.“Our goal isn’t to scare people,” she said. “The first step in solving a problem is acknowledging it, and with that, we think our study could be a useful puzzle piece.”The research was published in the journal Global Change Biology.

How cement “breathes in” and stores millions of tons of CO₂ a year

New analysis provides the first national, bottom-up estimate of cement’s natural carbon dioxide uptake across buildings and infrastructure.

The world’s most common construction material has a secret. Cement, the “glue” that holds concrete together, gradually “breathes in” and stores millions of tons of carbon dioxide (CO2) from the air over the lifetimes of buildings and infrastructure.  A new study from the MIT Concrete Sustainability Hub quantifies this process, carbon uptake, at a national scale for the first time. Using a novel approach, the research team found that the cement in U.S. buildings and infrastructure sequesters over 6.5 million metric tons of CO2 annually. This corresponds to roughly 13 percent of the process emissions — the CO2 released by the underlying chemical reaction — in U.S. cement manufacturing. In Mexico, the same building stock sequesters about 5 million tons a year.   But how did the team come up with those numbers? Scientists have known how carbon uptake works for decades. CO2 enters concrete or mortar — the mixture that glues together blocks, brick, and stones — through tiny pores, reacts with the calcium-rich products in cement, and becomes locked into a stable mineral called calcium carbonate, or limestone. The chemistry is well-known, but calculating the magnitude of this at scale is not. A concrete highway in Dallas sequesters CO2 differently than Mexico City apartments made from concrete masonry units (CMUs), also called concrete blocks or, colloquially, cinder blocks. And a foundation slab buried under the snow in Fairbanks, Alaska, “breathes in” CO2 at a different pace entirely. As Hessam AzariJafari, lead author and research scientist in the MIT Department of Civil and Environmental Engineering, explains, “Carbon uptake is very sensitive to context. Four major factors drive it: the type of cement used, the product we make with it — concrete, CMUs, or mortar — the geometry of the structure, and the climate and conditions it’s exposed to. Even within the same structure, uptake can vary five-fold between different elements.” As no two structures sequester CO2 in the same way, estimating uptake nationwide would normally require simulating an array of cement-based elements: slabs, walls, beams, columns, pavements, and more. On top of that, each of those has its own age, geometry, mixture, and exposure condition to account for.  Seeing that this approach would be like trying to count every grain of sand on a beach, the team took a different route. They developed hundreds of archetypes, typical designs that could stand in for different buildings and pieces of infrastructure. It’s a bit like measuring the beach instead by mapping out its shape, depth, and shoreline to estimate how much sand usually sits in a given spot.  With these archetypes in hand, the team modeled how each one sequesters CO2 in different environments and how common each is across every state in the United States and Mexico. In this way, they could estimate not just how much CO2 structures sequester, but why those numbers differ.  Two factors stood out. The first was the “construction trend,” or how the amount of new construction had changed over the previous five years. Because it reflects how quickly cement products are being added to the building stock, it shapes how much cement each state consumes and, therefore, how much of that cement is actively carbonating. The second was the ratio of mortar to concrete, since porous mortars sequester CO2 an order of magnitude faster than denser concrete. In states where mortar use was higher, the fraction of CO2 uptake relative to process emissions was noticeably greater. “We observed something unique about Mexico: Despite using half the cement that the U.S. does, the country has three-quarters of the uptake,” notes AzariJafari. “This is because Mexico makes more use of mortars and lower-strength concrete, and bagged cement mixed on-site. These practices are why their uptake sequesters about a quarter of their cement manufacturing emissions.” While care must be taken for structural elements that use steel reinforcement, as uptake can accelerate corrosion, it’s possible to enhance the uptake of many elements without negative impacts. Randolph Kirchain, director of the MIT Concrete Sustainability Hub, principal research scientist in the MIT Materials Research Laboratory, and the senior author of this study, explains: “For instance, increasing the amount of surface area exposed to air accelerates uptake and can be achieved by foregoing painting or tiling, or choosing designs like waffle slabs with a higher surface area-to-volume ratio. Additionally, avoiding unnecessarily stronger, less-porous concrete mixtures than required would speed up uptake while using less cement.” “There is a real opportunity to refine how carbon uptake from cement is represented in national inventories,” AzariJafari comments. “The buildings around us and the concrete beneath our feet are constantly ‘breathing in’ millions of tons of CO2. Nevertheless, some of the simplified values in widely used reporting frameworks can lead to higher estimates than what we observe empirically. Integrating updated science into international inventories and guidelines such as the Intergovernmental Panel on Climate Change (IPCC) would help ensure that reported numbers reflect the material and temporal realities of the sector.” By offering the first rigorous, bottom-up estimation of carbon uptake at a national scale, the team’s work provides a more representative picture of cement’s environmental impact. As we work to decarbonize the built environment, understanding what our structures are already doing in the background may be just as important as the innovations we pursue moving forward. The approach developed by MIT researchers could be extended to other countries by combining global building-stock databases with national cement-production statistics. It could also inform the design of structures that safely maximize uptake. The findings were published Dec. 15 in the  Proceedings of the National Academy of Sciences. Joining AzariJafari and Kirchain on the paper are MIT researchers Elizabeth Moore of the Department of Materials Science and Engineering and the MIT Climate Project and former postdocs Ipek Bensu Manav SM ’21, PhD ’24 and Motahareh Rahimi, along with Bruno Huet and Christophe Levy from the Holcim Innovation Center in France.

Panda Express pays fine for failing to train employees on handling hazardous materials

Panda Express has agreed to pay $1 million for failing to train employees on how to safely handle carbon dioxide in soda machines.

Panda Express has agreed to pay $1 million to settle a lawsuit claiming it failed to train its employees on how to handle its soda machines. The parent company of the Rosemead-based fast-casual Chinese American food chain had to pay a penalty for failing to educate its employees on handling carbon dioxide used for carbonated fountain beverage systems.The company didn’t immediately respond to a request for comment. Carbon dioxide is typically stored in tanks and is widely used by restaurants. California’s hazardous materials law requires that employees receive training on the storage and handling of carbon dioxide. Leaks that displace oxygen can result in serious harm or even death. Restaurants are required to certify employees and file reports with local regulators confirming such training.The lawsuit was filed after an investigation by Riverside County alleged that Panda Express failed to train its restaurant personnel on safe handling of carbon dioxide, and did not disclose employee training information as required by state law. Panda Express, the originator of the orange chicken, operates more than 500 locations in California, including 30 in Riverside County.“We don’t see a lot of these violations, so I would assume this would be a wake-up call for restaurants in general,” said Richard Shank, senior principal at Technomic, a research and consulting firm for the food services industry. “Typically, beverage stations are leased from a beverage supplier and serviced by third parties, including the CO2, so this may have identified a gap in training that was unknown to Panda.” “Panda’s workplace culture is built on a strong training foundation,” he added, “so I’m inclined to believe that this settlement possibly identifies a need to clarify roles between the beverage supplier and the restaurants.” The Riverside County district attorney’s office said the settlement was reached after Panda Express took steps to comply with California law regarding training and updating reporting and training records.Panda Express has been ordered to pay $881,925 in civil penalties, $100,000 in supplemental environmental projects, and $75,000 in cost reimbursement.

Ohio bills aim to sideline local critics of carbon capture projects

Ohio legislators are considering bills that would bar local governments from having a say in permitting projects that capture carbon dioxide emissions and inject them underground. The legislation could even force some landowners to let their property be used for carbon dioxide storage. The framework proposed in the…

Ohio legislators are considering bills that would bar local governments from having a say in permitting projects that capture carbon dioxide emissions and inject them underground. The legislation could even force some landowners to let their property be used for carbon dioxide storage. The framework proposed in the twin bills being considered by the state House and Senate starkly contrasts with Ohio’s approach to wind and solar farms, most of which can be blocked by counties. Instead, carbon capture and storage projects would follow a process similar to what’s used for oil and gas drilling, in which property owners must allow development on or below their land if enough neighbors support it. At least one large energy company, Tenaska, is already talking to Ohio landowners about obtaining rights to drill wells and store carbon dioxide from industrial and energy operations deep underground. An executive with the firm said the legislation would provide ​“clarity” for its planned carbon storage hub serving Ohio, West Virginia, and Pennsylvania. “This project will provide manufacturers, industrial facilities, and other businesses in this region with a solution to address growing environmental regulations and climate goals,” said Ali Kairys, senior director of project development for Tenaska. The company is in discussions with various carbon-emitting businesses, including steel refineries, ethanol plants, and power plants. The Appalachian Regional Clean Hydrogen Hub could also be a potential customer, Kairys said. In Ohio, Tenaska is eyeing Harrison, Jefferson, and Carroll counties as prime places to store CO2 underground. The three counties are among the state’s top oil and gas producers and have a history of coal mining. Tenaska initially hopes to store captured carbon dioxide in the Knox formation, which ranges from 8,500 feet to 12,000 feet below the Earth’s surface, Kairys said. Second-stage storage would use another formation roughly 5,500 to 8,000 feet underground. Other carbon sequestration projects could be on the horizon. The Great Plains Institute has identified roughly three dozen industrial facilities across the state as candidates for carbon capture projects. And even though the Trump administration is relaxing the environmental regulations that may motivate such efforts, 45Q tax credits expanded by the Inflation Reduction Act incentivize companies nationwide to develop storage projects. Ohio’s House Bill 170 and Senate Bill 136 would give the state Department of Natural Resources ​“sole and exclusive authority to regulate carbon sequestration,” a power the agency also has over oil and gas production via existing law. The Ohio Supreme Court has interpreted the oil and gas law’s language to block local government regulation of drilling, even through general zoning rules that apply to other businesses. If passed, the bills would similarly deprive counties and townships of any say over sequestration, said Bev Reed, an organizer for the Buckeye Environmental Network. ​“It’s … another really tragic thing that the Legislature is forcing on us.” The bills would also authorize a ​“consolidation” process that operators can undertake to force landowners to allow carbon dioxide storage in their property’s subsurface ​“pore space” if owners of 70% of the remaining area for an injection project have signed on. The process is similar to that for unitization, which lets oil and gas companies drill through dissenting landowners’ properties. The chief of the Ohio Department of Natural Resources’ oil and gas management division would be required to grant consolidation if it was ​“reasonably necessary to facilitate the underground storage of carbon dioxide.” A landowner could only object on the grounds that the facility’s design threatens ​“a commercially valuable mineral,” such as oil, gas, or coal. “You don’t get to object and say this is dangerous, this is ill-conceived or for any other reason,” said Heidi Gorovitz Robertson, a professor at Cleveland State University College of Law. ​“Reasonably necessary is a very low standard” for forcing property owners to give up the use of their pore space, she added. Asked to respond to advocacy groups’ complaints that the process is unfair, Tenaska’s Kairys focused instead on landowners’ potential for income.

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