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‘No way, not possible’: California has a plan for new water rules. Will it save salmon from extinction?

News Feed
Monday, December 16, 2024

In summary Growers and cities support the Newsom administration proposal, saying it strikes a balance for uses of Delta water. But environmentalists say the “healthy rivers” rules would actually harm California’s iconic salmon. The Newsom administration is refining a contentious set of proposed rules, years in the making, that would reshape how farms and cities draw water from the Central Valley’s Delta and its rivers. Backed by more than $1 billion in state funds, the rules, if adopted, would require water users to help restore rivers and rebuild depleted Chinook salmon runs.   The administration touts its proposed rules as the starting point of a long-term effort to double Central Valley Chinook populations from historical levels, reaching numbers not seen in at least 75 years. But environmental groups have almost unanimously rejected it, saying it promises environmental gains that will never materialize and jeopardizes the existence of California’s iconic salmon and other fish. “There is no way the assets they’ve put on the table, water and habitat combined, are going to achieve the doubling goal — no way, not possible,” said Jon Rosenfield, science director with San Francisco Baykeeper.  Dubbed Healthy Rivers and Landscapes but better known as “the voluntary agreements,” the proposal is one of two pathways for state officials as they update a keystone regulatory document called the Bay-Delta Water Quality Control Plan, which was last overhauled in 1995. With the ecosystem of the Bay-Delta in the throes of collapse, the set of rules is critical to determining how much water flows through the Delta for salmon and other species and how much is available for growers and cities in the Central Valley and Southern California. Once vital to indigenous cultures and the coastal ecosystem, Chinook salmon and other native fish have declined for decades due to dam operations, water diversions, increased water temperatures and marine food web issues. Numbers of spawning adult Chinook have dropped so low that all commercial and recreational salmon fishing has been banned for two years in a row, and preliminary numbers this year show no signs of recovery.  State officials from multiple agencies have lauded the Healthy Rivers program — which would meter out flows for fish while mandating restoration of floodplains and other river features — as their preferred option for updating the plan. California’s most influential water districts, serving tens of millions of people and most of the Central Valley’s farmland, have rallied behind the state’s preferred option, which has taken center stage during public workshops since November. Newsom administration officials have worked on these rules for years during negotiations with the San Joaquin Valley’s Westlands Water District, the nation’s largest agricultural water provider, the giant Metropolitan Water District of Southern California and other water users. California Resources Secretary Wade Crowfoot described the proposal as “a new and strengthened approach” that will protect both the environment and the water supply.  Crowfoot told the water board that the proposed rules would do “a good job working to balance all of (Californians’) needs, and ultimately help the environment to recover in ways that’s workable for communities across our state.”  Such a balance has long eluded state officials. “This is progress,” Chuck Bonham, director of the California Department of Fish and Wildlife, said at a November water board workshop. “It’s gone on so long. It’s time.”  Back in 2020, Gov. Gavin Newsom endorsed the “voluntary agreement” approach. “Today, I am committing to achieving a doubling of California’s salmon population by 2050. These agreements will be foundational to meeting that goal,” he wrote in a CalMatters opinion piece. The rules would do “a good job working to balance all of (Californians’) needs, and ultimately help the environment to recover in ways that’s workable for communities across our state.” California resources Secretary Wade Crowfoot Nina Hawk, the Bay-Delta Initiatives group manager with the Metropolitan Water District — which provides water that serves 19 million Southern Californians — said the Newsom proposal would create an equitable pathway to meeting human and environmental water demands. “It is important that we try to balance what the state board defines as beneficial uses … both for the environment and for farms, in a way that looks at the integrity of the water system and also for the state of California’s natural resources and its economy,” Hawk said.   Kevin Padway of the Zone 7 Water Agency, which serves 270,000 East Bay residents, encouraged the water board to adopt the rules, commending them as an “immediately implementable” route to balancing water demands for people and environmental uses. A drone provides a view of water pumped from the Harvey O. Banks Delta Pumping Plant into the California Aqueduct, which delivers Northern California river water to Southern California, on Jan. 20, 2023. Photo by Ken James, California Department of Water Resources But environmentalists aren’t sold. Some have even refused to call it by its formal name, saying it’s a euphemism with no bearing on “healthy rivers.” They say the rules would favor water users, allowing cities and farms to draw so much water from the Delta and its tributary rivers that salmon will continue their long decline. They say the proposed rules simply don’t offer fish the water they need, let alone support the state’s salmon rebuilding mandate.  “If you’re diverting more than half of a river’s flow, you are guaranteeing negative population growth” of salmon, said Gary Bobker, Friends of the River’s program director. The complex flow rules could even allow growers to entirely drain some rivers in critically dry years, according to Barry Nelson, a water policy analyst with the Golden State Salmon Association who spoke at a recent board workshop. “Dewatering rivers during droughts would be completely consistent with the Bay-Delta Plan,” he said.  The State Water Resources Control Board is the agency with the authority to approve the rules. A public hearing and vote could come in 2025. The water board’s other option would require strict minimum flows in rivers. Water users say those rules would have unacceptable impacts on farms, hydropower and communities — including planned housing projects — while environmentalists and tribes laud it as more protective of fish. It would ensure that rivers contain an average of 55% of the total water available in the watershed at a given time — a measure called unimpaired flow. While momentum has built behind the state’s Healthy Rivers plan, the state water board could still go either way with their vote. It is even possible that officials adopt both options, with the unimpaired flow pathway reserved as a regulatory backstop, should the Newsom proposal fail, or as concurrent rules applied to waters users who opt out of the voluntary agreements.   Doubling Chinook runs — is it a stream dream A longstanding mandate requires fishery and water managers to double the Central Valley’s population of naturally reproducing Chinook salmon from levels observed between 1967 and 1991. This would translate into an average of 990,000 spawning Chinook each year, almost 10 times recent averages. State officials say their Healthy Rivers plan would help to realize this goal. Around year-eight — when the program could be extended — officials hope to be about 25% of the way to the doubling goal, said Louise Conrad, lead scientist with the state Department of Water Resources.   “Salmon runs could potentially be extinct by then with the flow assets they’re putting forward.”Ashley Overhouse, defenders of wildlife Officials with the National Marine Fisheries Service, in a January letter to the state, said the eight-year timeframe “is concerning, given the dire status of native fish species within the Sacramento River Basin and Delta.” The U.S. Environmental Protection Agency, in comments emailed to the Water Board in January, noted the light water allowances in critically dry years. “EPA is concerned that the total volume and timing of Delta inflow and outflow provided under the proposed VA (voluntary agreement) alternative relative to baseline is not large enough to adequately restore and protect aquatic ecosystems,” the agency wrote.  Fall-run Chinook salmon migrate and spawn in the Feather River near the Feather River Fish Hatchery in Oroville on Nov. 15, 2024. The iconic fish are depleted from a combination of water diversions in the Delta, increased water temperatures and other factors. Photo by Xavier Mascareñas, California Department of Water Resources This target of doubling Chinook is nothing new. The almost legendary “doubling goal” has been on the books since the early 1990s, when federal law set the deadline for 2002.  Now the state’s proposed rules would punt it to 2050 — what salmon advocates say is much too far away for a species already on the brink and a vanishing fishing industry. “Salmon runs could potentially be extinct by then with the flow assets they’re putting forward,” said Ashley Overhouse, Defenders of Wildlife’s water policy advisor. Representatives of California tribes, who historically relied on Chinook as a dietary mainstay, say they were excluded from planning discussions.  “The only people that have been at the table talking about the voluntary agreements are water agencies, water contractors, irrigation districts, and private companies,” said Gary Mulcahy, government liaison for the Winnemem Wintu Tribe. “They (state officials) have excluded tribes, disadvantaged communities, environmental justice communities for nine years.” State officials “have excluded tribes, disadvantaged communities, environmental justice communities for nine years.”Gary Mulcahy, Winnemem Wintu Tribe But the flow rules environmentalists and tribes prefer would cut deep into urban and agricultural water supplies, causing “impacts far and wide” on water exports from the Delta, storage in upstream reservoirs and hydropower production, said Jennifer Pierre, general manager of the State Water Contractors, which represents 27 water agencies that serve 750,000 acres of farmland and 27 million people. Farmers, she said, would experience substantial permanent economic losses, forcing widespread fallowing of their crops. San Joaquin Valley growers would lose more than a quarter of their water in dry years, and 13% on average for all years, according to the draft rules. Thaddeus Bettner, executive director of the Sacramento River Settlement Contractors — a group of farmers who largely grow rice  — said it would force as much as 30% of his district’s 450,000 irrigated acres out of production, with harder impacts on growers with little groundwater to fall back on.  Rice farmer Jon Munger, with 13,000 acres on the east side of the Sacramento Valley, said, in some years, the unimpaired flow approach favored by environmentalists could strip him of virtually all of his water in summer months. His groundwater supply is very limited. “We wouldn’t have any water to grow rice,” he said.  That option would also squeeze residential water use. The Placer County Water Agency, which serves about a quarter-million residents northeast of Sacramento, would lose almost half its supply, threatening initiatives to accommodate a growing population, said General Manager Andrew Fecko.  It would cost Southern California a big chunk of its municipal water, too.  Under the environmentalists’ option, “we wouldn’t have sufficient water supply. It would be a decline at the taps, it would be a decline for businesses.”Nina Hawk, Metropolitan Water District of Southern California “We wouldn’t have sufficient water supply,” said Hawk at the Metropolitan Water District. “It would be a decline at the taps, it would be a decline for businesses.” Billions of dollars in new salmon habitat The program proposes restoring 45,000 acres of structural habitat, like floodplains, tidal marshes, in-river piles of woody debris and gravel spawning beds over the next eight years.  Thousands of acres are already completed or underway. This, according to Overhouse at Defenders of Wildlife, leaves roughly 30,000 planned acres that would be brand new additions to the ecosystem — which she and others say would mute the promised benefits of the program.  All of this will cost money, and to date $2.4 billion in public funds have been secured to support the flow measures and the habitat restoration. Another $500 million may be needed. The state’s proposed rules would allocate to the Sacramento River system between 100,000 and 700,000 acre-feet of water per year, depending on how much precipitation has fallen. But environmentalists say this isn’t nearly enough. They also worry that regulatory loopholes would allow future water projects — such as the Sites Reservoir, for which Newsom advocated at a public appearance last week — to divert water that would be protected if the state adopted unimpaired flow rules. “It is not an accident that they haven’t solved this problem,” Nelson, with the Salmon Association, said. “The VAs (voluntary agreements) and the Delta tunnel and Sites are a package.”  Some conservationists are optimistic about the state’s proposal. Rene Henery, California science director with Trout Unlimited, thinks more habitat and water — especially in dry years — will be needed to protect salmon. But he also thinks the rules could succeed, as long as it’s just the first step of many in a flexible and collaborative restoration process — something he and a team of colleagues are trying to initiate with a state-funded project called Reorienting to Recovery.   UC Davis fish biologist Carson Jeffres, who has studied floodplain restoration projects, also said the salmon doubling objective is achievable through the Newsom proposal as long as state officials “have the courage to be nimble and adjust and adapt if it looks like things aren’t going as planned.” Tribal water rights advocate Regina Chichizola, executive director of Save California Salmon, rejected the Newsom administration’s notion that the state balances competing needs and demands.  “We’ve compromised so much that we’re facing an extinction crisis, that tribes don’t have fish for ceremonies,” she told the board in an emotional public comment last week. “Of course I want to make sure that all of the cities have access to water, but in the end agriculture is going to have to use less water,” she said. “The job of the water board is not to make everyone happy, it’s to protect beneficial uses and clean water, and if the salmon go extinct on your watch, that’s something that you’re going to have to tell your grandkids about.” A third straight year with no California salmon fishing?  Early fish counts suggest it could happen October 30, 2024October 30, 2024 Is a new plan for delivering Delta water worse than Trump’s rules? Environmentalists say yes. October 25, 2024October 24, 2024

Growers and cities support the Newsom administration proposal, saying it strikes a balance for uses of Delta water. But environmentalists say the “healthy rivers” rules would actually harm California’s iconic salmon.

Various Chinook salmon swim in water, with rocks underneath them, as bubble from waves form overhead. The image has a sense of action and frenzy.

In summary

Growers and cities support the Newsom administration proposal, saying it strikes a balance for uses of Delta water. But environmentalists say the “healthy rivers” rules would actually harm California’s iconic salmon.

The Newsom administration is refining a contentious set of proposed rules, years in the making, that would reshape how farms and cities draw water from the Central Valley’s Delta and its rivers. Backed by more than $1 billion in state funds, the rules, if adopted, would require water users to help restore rivers and rebuild depleted Chinook salmon runs.  

The administration touts its proposed rules as the starting point of a long-term effort to double Central Valley Chinook populations from historical levels, reaching numbers not seen in at least 75 years. But environmental groups have almost unanimously rejected it, saying it promises environmental gains that will never materialize and jeopardizes the existence of California’s iconic salmon and other fish.

“There is no way the assets they’ve put on the table, water and habitat combined, are going to achieve the doubling goal — no way, not possible,” said Jon Rosenfield, science director with San Francisco Baykeeper. 

Dubbed Healthy Rivers and Landscapes but better known as “the voluntary agreements,” the proposal is one of two pathways for state officials as they update a keystone regulatory document called the Bay-Delta Water Quality Control Plan, which was last overhauled in 1995.

With the ecosystem of the Bay-Delta in the throes of collapse, the set of rules is critical to determining how much water flows through the Delta for salmon and other species and how much is available for growers and cities in the Central Valley and Southern California.

Once vital to indigenous cultures and the coastal ecosystem, Chinook salmon and other native fish have declined for decades due to dam operations, water diversions, increased water temperatures and marine food web issues. Numbers of spawning adult Chinook have dropped so low that all commercial and recreational salmon fishing has been banned for two years in a row, and preliminary numbers this year show no signs of recovery. 

State officials from multiple agencies have lauded the Healthy Rivers program — which would meter out flows for fish while mandating restoration of floodplains and other river features — as their preferred option for updating the plan.

California’s most influential water districts, serving tens of millions of people and most of the Central Valley’s farmland, have rallied behind the state’s preferred option, which has taken center stage during public workshops since November.

Newsom administration officials have worked on these rules for years during negotiations with the San Joaquin Valley’s Westlands Water District, the nation’s largest agricultural water provider, the giant Metropolitan Water District of Southern California and other water users.

California Resources Secretary Wade Crowfoot described the proposal as “a new and strengthened approach” that will protect both the environment and the water supply. 

Crowfoot told the water board that the proposed rules would do “a good job working to balance all of (Californians’) needs, and ultimately help the environment to recover in ways that’s workable for communities across our state.” 

Such a balance has long eluded state officials.

“This is progress,” Chuck Bonham, director of the California Department of Fish and Wildlife, said at a November water board workshop. “It’s gone on so long. It’s time.” 

Back in 2020, Gov. Gavin Newsom endorsed the “voluntary agreement” approach. “Today, I am committing to achieving a doubling of California’s salmon population by 2050. These agreements will be foundational to meeting that goal,” he wrote in a CalMatters opinion piece.

The rules would do “a good job working to balance all of (Californians’) needs, and ultimately help the environment to recover in ways that’s workable for communities across our state.” 

California resources Secretary Wade Crowfoot

Nina Hawk, the Bay-Delta Initiatives group manager with the Metropolitan Water District — which provides water that serves 19 million Southern Californians — said the Newsom proposal would create an equitable pathway to meeting human and environmental water demands.

“It is important that we try to balance what the state board defines as beneficial uses … both for the environment and for farms, in a way that looks at the integrity of the water system and also for the state of California’s natural resources and its economy,” Hawk said.  

Kevin Padway of the Zone 7 Water Agency, which serves 270,000 East Bay residents, encouraged the water board to adopt the rules, commending them as an “immediately implementable” route to balancing water demands for people and environmental uses.

A drone provides a view of water pumped from the Harvey O. Banks Delta Pumping Plant into the California Aqueduct at 9,790 cubic feet per second after January storms. The facility located in Alameda County and lifts water into the California Aqueduct. Jan. 20, 2023. Photo by Ken James, California Department of Water Resources
A drone provides a view of water pumped from the Harvey O. Banks Delta Pumping Plant into the California Aqueduct, which delivers Northern California river water to Southern California, on Jan. 20, 2023. Photo by Ken James, California Department of Water Resources

But environmentalists aren’t sold. Some have even refused to call it by its formal name, saying it’s a euphemism with no bearing on “healthy rivers.” They say the rules would favor water users, allowing cities and farms to draw so much water from the Delta and its tributary rivers that salmon will continue their long decline. They say the proposed rules simply don’t offer fish the water they need, let alone support the state’s salmon rebuilding mandate. 

“If you’re diverting more than half of a river’s flow, you are guaranteeing negative population growth” of salmon, said Gary Bobker, Friends of the River’s program director.

The complex flow rules could even allow growers to entirely drain some rivers in critically dry years, according to Barry Nelson, a water policy analyst with the Golden State Salmon Association who spoke at a recent board workshop.

“Dewatering rivers during droughts would be completely consistent with the Bay-Delta Plan,” he said. 

The State Water Resources Control Board is the agency with the authority to approve the rules. A public hearing and vote could come in 2025.

The water board’s other option would require strict minimum flows in rivers. Water users say those rules would have unacceptable impacts on farms, hydropower and communities — including planned housing projects — while environmentalists and tribes laud it as more protective of fish. It would ensure that rivers contain an average of 55% of the total water available in the watershed at a given time — a measure called unimpaired flow.

While momentum has built behind the state’s Healthy Rivers plan, the state water board could still go either way with their vote. It is even possible that officials adopt both options, with the unimpaired flow pathway reserved as a regulatory backstop, should the Newsom proposal fail, or as concurrent rules applied to waters users who opt out of the voluntary agreements.  

Doubling Chinook runs — is it a stream dream

A longstanding mandate requires fishery and water managers to double the Central Valley’s population of naturally reproducing Chinook salmon from levels observed between 1967 and 1991. This would translate into an average of 990,000 spawning Chinook each year, almost 10 times recent averages.

State officials say their Healthy Rivers plan would help to realize this goal. Around year-eight — when the program could be extended — officials hope to be about 25% of the way to the doubling goal, said Louise Conrad, lead scientist with the state Department of Water Resources.  

“Salmon runs could potentially be extinct by then with the flow assets they’re putting forward.”

Ashley Overhouse, defenders of wildlife

Officials with the National Marine Fisheries Service, in a January letter to the state, said the eight-year timeframe “is concerning, given the dire status of native fish species within the Sacramento River Basin and Delta.”

The U.S. Environmental Protection Agency, in comments emailed to the Water Board in January, noted the light water allowances in critically dry years.

“EPA is concerned that the total volume and timing of Delta inflow and outflow provided under the proposed VA (voluntary agreement) alternative relative to baseline is not large enough to adequately restore and protect aquatic ecosystems,” the agency wrote. 

A shallow stream flowing through with a fish visible above the river bottom over rocks and gravel. The fish is swimming just under the river's surface with another fish in the distant background.
Fall-run Chinook salmon migrate and spawn in the Feather River near the Feather River Fish Hatchery in Oroville on Nov. 15, 2024. The iconic fish are depleted from a combination of water diversions in the Delta, increased water temperatures and other factors. Photo by Xavier Mascareñas, California Department of Water Resources

This target of doubling Chinook is nothing new. The almost legendary “doubling goal” has been on the books since the early 1990s, when federal law set the deadline for 2002. 

Now the state’s proposed rules would punt it to 2050 — what salmon advocates say is much too far away for a species already on the brink and a vanishing fishing industry.

“Salmon runs could potentially be extinct by then with the flow assets they’re putting forward,” said Ashley Overhouse, Defenders of Wildlife’s water policy advisor.

Representatives of California tribes, who historically relied on Chinook as a dietary mainstay, say they were excluded from planning discussions. 

“The only people that have been at the table talking about the voluntary agreements are water agencies, water contractors, irrigation districts, and private companies,” said Gary Mulcahy, government liaison for the Winnemem Wintu Tribe. “They (state officials) have excluded tribes, disadvantaged communities, environmental justice communities for nine years.”

State officials “have excluded tribes, disadvantaged communities, environmental justice communities for nine years.”

Gary Mulcahy, Winnemem Wintu Tribe

But the flow rules environmentalists and tribes prefer would cut deep into urban and agricultural water supplies, causing “impacts far and wide” on water exports from the Delta, storage in upstream reservoirs and hydropower production, said Jennifer Pierre, general manager of the State Water Contractors, which represents 27 water agencies that serve 750,000 acres of farmland and 27 million people.

Farmers, she said, would experience substantial permanent economic losses, forcing widespread fallowing of their crops. San Joaquin Valley growers would lose more than a quarter of their water in dry years, and 13% on average for all years, according to the draft rules.

Thaddeus Bettner, executive director of the Sacramento River Settlement Contractors — a group of farmers who largely grow rice  — said it would force as much as 30% of his district’s 450,000 irrigated acres out of production, with harder impacts on growers with little groundwater to fall back on. 

Rice farmer Jon Munger, with 13,000 acres on the east side of the Sacramento Valley, said, in some years, the unimpaired flow approach favored by environmentalists could strip him of virtually all of his water in summer months. His groundwater supply is very limited.

“We wouldn’t have any water to grow rice,” he said. 

That option would also squeeze residential water use. The Placer County Water Agency, which serves about a quarter-million residents northeast of Sacramento, would lose almost half its supply, threatening initiatives to accommodate a growing population, said General Manager Andrew Fecko. 

It would cost Southern California a big chunk of its municipal water, too. 

Under the environmentalists’ option, “we wouldn’t have sufficient water supply. It would be a decline at the taps, it would be a decline for businesses.”

Nina Hawk, Metropolitan Water District of Southern California

“We wouldn’t have sufficient water supply,” said Hawk at the Metropolitan Water District. “It would be a decline at the taps, it would be a decline for businesses.”

Billions of dollars in new salmon habitat

The program proposes restoring 45,000 acres of structural habitat, like floodplains, tidal marshes, in-river piles of woody debris and gravel spawning beds over the next eight years. 

Thousands of acres are already completed or underway. This, according to Overhouse at Defenders of Wildlife, leaves roughly 30,000 planned acres that would be brand new additions to the ecosystem — which she and others say would mute the promised benefits of the program. 

All of this will cost money, and to date $2.4 billion in public funds have been secured to support the flow measures and the habitat restoration. Another $500 million may be needed.

The state’s proposed rules would allocate to the Sacramento River system between 100,000 and 700,000 acre-feet of water per year, depending on how much precipitation has fallen. But environmentalists say this isn’t nearly enough. They also worry that regulatory loopholes would allow future water projects — such as the Sites Reservoir, for which Newsom advocated at a public appearance last week to divert water that would be protected if the state adopted unimpaired flow rules.

“It is not an accident that they haven’t solved this problem,” Nelson, with the Salmon Association, said. “The VAs (voluntary agreements) and the Delta tunnel and Sites are a package.” 

Some conservationists are optimistic about the state’s proposal.

Rene Henery, California science director with Trout Unlimited, thinks more habitat and water — especially in dry years — will be needed to protect salmon. But he also thinks the rules could succeed, as long as it’s just the first step of many in a flexible and collaborative restoration process — something he and a team of colleagues are trying to initiate with a state-funded project called Reorienting to Recovery.  

UC Davis fish biologist Carson Jeffres, who has studied floodplain restoration projects, also said the salmon doubling objective is achievable through the Newsom proposal as long as state officials “have the courage to be nimble and adjust and adapt if it looks like things aren’t going as planned.”

Tribal water rights advocate Regina Chichizola, executive director of Save California Salmon, rejected the Newsom administration’s notion that the state balances competing needs and demands. 

“We’ve compromised so much that we’re facing an extinction crisis, that tribes don’t have fish for ceremonies,” she told the board in an emotional public comment last week.

“Of course I want to make sure that all of the cities have access to water, but in the end agriculture is going to have to use less water,” she said. “The job of the water board is not to make everyone happy, it’s to protect beneficial uses and clean water, and if the salmon go extinct on your watch, that’s something that you’re going to have to tell your grandkids about.”

Read the full story here.
Photos courtesy of

The Water Came From Nowhere': Settlements, Hotels and Farms Flooded in Kenya’s Rift Valley

Dickson Ngome's farm at Lake Naivasha in Kenya's Rift Valley has been submerged due to rising water levels

NAIVASHA, Kenya (AP) — When Dickson Ngome first leased his farm at Lake Naivasha in Kenya’s Rift Valley in 2008, it was over 2 kilometers (1.2 miles) from shore. The farm was on 1.5 acres (0.6 hectares) of fertile land where he grew vegetables to sell at local markets.At the time, the lake was receding and people were worried that it might dry up altogether. But since 2011, the shore has crept ever closer. The rains started early this year, in September, and didn't let up for months.One morning in late October, Ngome and his family woke up to find their home and farm inside the lake. The lake levels had risen overnight and about a foot of water covered everything.“It seemed as if the lake was far from our homes,” Ngome’s wife, Rose Wafula, told The Associated Press. “And then one night we were shocked to find our houses flooded. The water came from nowhere.” Climate change caused increased rains, scientists say The couple and their four children have had to leave home and are camping out on the first floor of an abandoned school nearby.Some 5,000 people were displaced by the rise in Lake Naivasha’s levels this year. Some scientists attribute the higher levels to increased rains caused by climate change, although there may be other factors causing the lake’s steady rise over the past decade.The lake is a tourism hot spot and surrounded by farms, mostly growing flowers, which have gradually been disappearing into the water as the lake levels rise.Rising levels have not been isolated to Naivasha: Kenya’s Lake Baringo, Lake Nakuru and Lake Turkana — all in the Rift Valley — have been steadily rising for 15 years. “The lakes have risen almost beyond the highest level they have ever reached,” said Simon Onywere, who teaches environmental planning at Kenyatta University in Kenya’s capital Nairobi. Rising lake levels displaced tens of thousands A study in the Journal of Hydrology last year found that lake areas in East Africa increased by 71,822 square kilometers (27,730 square miles) between 2011 and 2023. That affects a lot of people: By 2021, more than 75,000 households had been displaced across the Rift Valley, according to a study commissioned that year by the Kenyan Environment Ministry and the United Nations Development Program.In Baringo, the submerged buildings that made headlines in 2020 and 2021 are still underwater.“In Lake Baringo, the water rose almost 14 meters,” Onywere said. “Everything went under, completely under. Buildings will never be seen again, like the Block Hotels of Lake Baringo.” Flower farms taking a beating Lake Naivasha has risen steadily too, “engulfing three quarters of some flower farms,” Onywere said.Horticulture is a major economic sector in Kenya, generating just over a billion U.S. dollars in revenue in 2024 and providing 40% of the volume of roses sold in the European Union, according to Kenya’s Ministry of Foreign Affairs.Significant research has gone into the reasons behind the rising lakes phenomenon: A 2021 study on the rise of Kenya’s Rift Valley lakes was coauthored by Kenyan meteorologist Richard Muita, who is now acting assistant director of the Kenya Meteorological Department.“There are researchers who come up with drivers that are geological, others with reasons like planetary factors,” Muita said. “The Kenya Meteorological Department found that the water level rises are associated with rainfall patterns and temperature changes. When the rains are plentiful, it aligns with the increase in the levels of the Rift Valley lake waters.”Sedimentation is also a factor. “From the research I have read, there’s a lot of sediment, especially from agricultural related activities, that flows into these lakes,” says Muita. ‘A mess’ made by the government years ago Naivasha’s official high water mark was demarcated at 1,892.8 meters (6,210 feet) above sea level by the Riparian Association in 1906, and is still used by surveyors today. That means this year’s flooding was still almost a meter (3 feet) below the high mark.It also means that the community of Kihoto on Lake Naivasha where the Ngomes lived lies on riparian land — land that falls below the high water mark, and can only be owned by the government.“It’s a mess established by the government … towards the late 1960s,” said Silas Wanjala, general manager of the Lake Naivasha Riparian Association, which was founded some 120 years ago and has been keeping meticulous records of the lake’s water levels since.Back then, a farmer was given a “temporary agricultural lease” on Kihoto, said Wanjala. When it later flooded and the farmer packed up and left, the farmworkers stayed on the land and later applied for subdivisions, which were approved. In the 60-odd years since, a whole settlement has grown on land that is officially not for lease or sale. This also isn’t the first time it’s been flooded, said Wanjala. It's just very rare that the water comes up this high. That’s little consolation for the people who have been displaced by this year’s floods and now cannot go home without risking confrontations with hippopotamuses.To support those people, the county is focusing its efforts on where the need is greatest.“We are tackling this as an emergency," says Joyce Ncece, chief officer for disaster management in Nakuru County, which oversees Lake Naivasha. “The county government has provided trucks to help families relocate. We have been helping to pay rent for those who lack the finances.”Scientists like Onywere and Muita are hoping for longer-term solutions. “Could we have predicted this so that we could have done better infrastructure in less risk-prone areas?” Onywere said.Muita wants to see a more concerted global effort to combat climate change, as well as local, nature-based solutions centered on Indigenous knowledge, such as “conservation agriculture, where there is very limited disturbance of the land,” to reduce sedimentation of the lakes.But all of this is of little help to Ngome and Wafula, who are still living at the school with their children. As the rest of the world looks forward to the holidays and new year, their future is uncertain. Lake Naivasha’s continuous rise over the past 15 years does not bode well: They have no idea when, or if, their farm will ever be back on dry land. The Associated Press receives financial support for global health and development coverage in Africa from the Gates Foundation. The AP is solely responsible for all content. Find AP’s standards for working with philanthropies, a list of supporters and funded coverage areas at AP.org.Copyright 2025 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.Photos You Should See – December 2025

A damaged King County levee awaited fixes for years. Then it failed

As an atmospheric river slammed into the Pacific Northwest, water burst through a damaged levee in Washington.

As rainfall inundated the Pacific Northwest this month, swelling the region’s rivers to record levels, the Desimone levee seemed destined to fail.Severe flooding in 2020 had damaged the 2.2-mile earthen barrier near Tukwila. Muddy waters from the Green River bubbled up on the opposite side and seeped into nearby properties. A King County report months later described the levee’s weakened state as the “most important issue” on the river’s lower reach.The years that followed were filled with red tape and bureaucratic infighting among the agencies most responsible for the region’s levee system: King County, its flood control district and the U.S. Army Corps of Engineers. All the while, cities in the flood plain clamored for help, and the Desimone awaited repair.Construction was set to begin this summer, but the Corps pulled out of the work in January, revoking promised federal funding and setting the project back years, according to interviews and public records obtained by The Seattle Times.Reagan Dunn, chair of the district’s advisory committee and a Metropolitan King County Council member, described a pattern of “tension” between the flood control district and the Corps.This month’s back-to-back atmospheric rivers pushed the levee system like never before. The Desimone was the first of two to fail.Earlier in the series of storms, water had once again begun to seep through Desimone’s earthen barrier, which shields a mostly commercial and industrial hub in Tukwila. On Monday, the river tore its way through, sparking a widespread evacuation. Officials feared the ensuing flash flood might be deadly. Workers plugged the hole quickly. Knowing the levee’s risk, they had already been watching the site for days. No injuries were reported in the breach.The patchwork nature of repairs at Desimone, and levees like it, illuminates the growing challenge of protecting Western Washington communities from flooding worsened by climate change.For generations, Washington has relied on levees as a simple solution to a complex problem, said Alan Hamlet, a former Seattle resident and scientist who now works as an associate professor of civil and environmental engineering at the University of Notre Dame. Explosive growth behind them has combined with an overarching desire to spend the minimum required for flood protection, he said. That often means deferring costlier long-term maintenance, mitigation and upgrades of these emergency barriers in favor of more pressing needs. This has resulted in higher risks for the very communities the levees were designed to protect.The state, and much of the country, stands at the nexus of that growth behind the walls of inadequate infrastructure to keep natural disasters at bay, Hamlet said.“Put all those things together and you have a hidden crisis that is going to begin to express itself more and more frequently,” Hamlet said.The 18-year-old King County Flood Control District shuffles its priority levees based on disrepair that changes with the weather. The district has started to plan for the long term, but in its earliest years, it focused on inexpensive and easy fixes in high-risk areas, Dunn said.“In other words, low-hanging fruit,” he said.Flooding in Washington state 2025Bureaucratic tangleThe Desimone levee has been damaged and repaired multiple times over the past six decades. Most recently, years of disagreements among agencies dragged out Desimone’s renovation.The flood control district asked the Corps to step in not long after the 2020 flood. High waters in the Green River then had not only left water seeping through the levee in at least three places, but also bubbling up from underneath.Federal officials agreed to spearhead a plan to repair the levee and cover 80% of the cost. It proposed estimates up to $16.6 million for a project focused solely on restoring the levee to its preflood condition, records show.Such is frequently the case for levee systems nationwide, Hamlet said. Restoring them to their original condition is typically less expensive and complicated. Expanding them or exploring other options takes more time, money and political will.But the flood district wanted more for Desimone: a design that would fix the damage and relieve water pressure further by setting the levee back, restoring some of the river’s natural bank. It was projected to cost the district about $30 million.The district’s plan would take longer and cost more but reduce long-term risks, said Michelle Clark, the district’s director. “We want to do a bigger project so that we’re not coming back to do more repairs.”The flood control district handles planning, but the project hinged on King County finding land along the river for the new work, records show. But it fell short.These types of repairs are more complicated than they might seem, Hamlet said. Strengthen a levee in one place, and you’ll send floodwaters careening into another. Set a levee back from the river, or remove one to restore a flood plain, and first you have to clear out any homes or businesses already there. These structures aren’t the only way to hold back floodwaters, but in many places, they’re the system that’s already there.A failed dealThe Corps worked in fits and starts, at one point in 2022 halting its involvement due to staffing challenges. Even when the county made headway securing land, the Corps said it had used the wrong language in the agreements. At the same time, the county accused the Corps of clerical errors that dragged out the planning process, according to county records.The county — officials for which said they were unable to immediately comment, citing the ongoing flood emergency — was confident it could secure the land, just not on schedule, according to a county brief from April. It proposed breaking ground in 2026 instead.Citing the county’s “inability” to provide the needed land along the highly developed and industrial area, the Corps backed out of the agreement in a January letter.“We have been pushing them since 2020,” Clark said. “And it’s frustrating.”The Corps “worked diligently with King County” but couldn’t move forward without land for construction, the agency wrote in an email to The Times. Levee rehabilitation can be “complex,” it added. “The federal process, sponsor timelines and real estate actions do not always align well, but we are committed to finding a solution when possible,” the agency wrote.Abandoned by the Corps, the county and its partner cities faced their biggest setback, Clark said.Everybody blamed each other as the flood season approached.Concerns heightened after the Corps pulled its support. In July, city leaders from Tukwila, Kent and Renton asked the flood district to more immediately prioritize the levee repair project.Tukwila officials declined to comment, and Kent and Renton officials did not respond to a request for comment by publication time.As the fall rains approached — and without significant improvements on the levee — officials from Tukwila, Kent, King County and the Corps of Engineers spoke in late October to review the contingency plan in case the structure failed, according to Tukwila city records. They walked the levee bank to flag logistical challenges and clarified roles and responsibilities in case of an emergency.The Corps passed along its nearly complete project design for the Desimone levee, according to its January letter to the district. But without the federal government to offset the cost, the county’s grand plan was too pricey. The district has years of research and $25 million set aside for the levee repairs, but it might not be enough, Clark said; it needs to prepare options before it can move forward with a plan.The King County Flood Control District is now, in many ways, exactly where it was in 2020: waiting for the water to recede, preparing to assess the damage and on the verge of once again planning how to fix the Desimone.--Conrad Swanson and Lulu Ramadan© 2025 The Seattle Times. Visit www.seattletimes.com. Distributed by Tribune Content Agency, LLC.

UK’s largest proposed datacentre ‘understating planned water use’

Analysis suggests consumption at Northumberland site could be 50 times higher than US operator QTS estimatesThe UK’s largest proposed datacentre is understating the scale of its planned water use, according to an analysis.The first phase of construction for the hyperscale campus in Cambois in Northumberland has been given the go-ahead by the local council. The US operator QTS, which is developing the site, has promoted its “water-free” cooling system as proof of its sustainability. Continue reading...

The UK’s largest proposed datacentre is understating the scale of its planned water use, according to an analysis.The first phase of construction for the hyperscale campus in Cambois in Northumberland has been given the go-ahead by the local council. The US operator QTS, which is developing the site, has promoted its “water-free” cooling system as proof of its sustainability.But research published this week calls that claim into question. A study of the power and water footprints of AI production by the data scientist Alex de Vries-Gao highlights the underestimated scale of indirect, or embedded, water consumption caused by datacentre operations.QTS estimates the two initial data halls will consume 2.3m litres of water annually, according to documents it submitted to Northumberland county council. Yet applying De Vries-Gao’s methodology to the electricity generation required for the site’s AI servers produces a figure more than 50 times higher, at 124m litres a year, according to analysis by Watershed Investigations and the Guardian.When all the 10 planned halls are operational, the Cambois campus could indirectly consume about 621m litres annually – equivalent to the average yearly use of more than 11,000 people.The company uses a closed-loop system, which typically reuses the same water repeatedly for cooling, but uses more energy to chill the machines. QTS says there will be no pressure on water supply for people in the north-east fromits direct datacentre operations.In a statement, QTS said: “Our power is typically carbon neutral and comes from a range of sources including wind, hydro, nuclear, tidal, etc. QTS does not control the quantity of any water utilised in the power generation process.”But according to De Vries-Gao, datacentre operators must acknowledge the water footprint linked to their massive energy demands, in the same way that power-intensive industries are held accountable for the carbon emissions generated by their electricity consumption.De Vries-Gao said: “The datacentre operator will be responsible for creating the power demand which leads to the consumption of this water. For the same reason, the greenhouse gas protocol already mandates disclosure of indirect emissions related to electricity consumption.”Another potentially understated problem is the air pollution from the datacentre from increased power generation and potential greater use of diesel generators than stated.In the US, researchers and environmental groups have sounded the alarm about worsening air quality as a result of growing emissions of fine particulate matter and nitrogen oxides (NOx) from the power plants and backup generators datacentres rely on. Increased emissions are a result of surging power demand to produce AI systems, according to a recent study. According to Shaolei Ren of the University of California, one of the study’s authors, the evidence connecting datacentre growth to harmful health outcomes from air pollution is already “very strong”.“What is missing is awareness and precise quantitative accounting. The critical gap is that we still do not know, in a transparent and systematic way, how much criteria air pollution data centres actually contribute at the local and regional levels,” Ren said.Common pollutants include ozone, fine particulate matter, carbon monoxide, sulfur dioxide, nitrogen dioxide and lead, which damage human health and the wider environment.This pollution is not only the result of electricity generation from the grid. A proportion often comes from highly-polluting diesel generators, installed to ensure the nearly constant “uptime” demanded by the datacentre and AI industry.Once complete, the Cambois campus will rely on nearly 600 diesel generators for “backup” power – up to 58 per data hall. QTS estimates that regular testing of the system would mean running each generator for five hours a year.The generators have been designated as a backup power system to be used in emergencies if the grid fails. But in Virginia’s “datacentre alley”, a hub where QTS has a datacentre, regulators are considering expanding diesel generator use for planned outages, while environmentalists have warned of pressure to permit generators during grid stress.Julie Bolthouse from the Piedmont Environmental Council, a conservation organisation, said: “They are incrementally increasing under what circumstances they can run and de facto how frequently and how long they can run the thousands of generators we have permitted here in Virginia. Once the generators are in place it is only a matter of time before they use them.”The potential impact of this scenario playing out in Cambois could have negative effects on the local community’s health. Cambois primary school’s playground has been identified by QTS as directly affected by emissions from the generators.In a statement, QTS said: “Generators can occasionally be utilised on a temporary basis to bridge power needs while permanent connections are finalised, but the primary use of generators is for emergency backup purposes.“Diesel generators are not the main source of power for our datacentres. Generators are tested once a month for a short period of time for routine maintenance. Each data centre has a publicly available emissions limit and our normal operations are designed to stay well within those requirements. In the highly unlikely event of a complete grid outage in the UK, backup generators would run only for the duration of such grid outage and at reduced power. Regarding Virginia, QTS has zero control over our competitors.”

These giant sea reptiles lived in freshwater rivers, too

Scientists thought mosasaurs - giant sea reptiles - lived in oceans. But the discovery of fossils in North Dakota shows they may also have lived in freshwater. The post These giant sea reptiles lived in freshwater rivers, too first appeared on EarthSky.

Watch Melanie During of Vrije University in the Netherlands talk about mosasaurs in the late Cretaceous. Researchers found a tooth from a mosasaur in North Dakota that dates back 66 million years. The find suggests these giant sea reptiles lived in freshwater as well as oceans. Video via Genuine Rockstars (Dennis Voeten and Melanie During). EarthSky’s 2026 lunar calendar is available now. Get yours today! Makes a great gift. Mosasaurs were the apex predators of the sea during the late Cretaceous, 94 to 66 million years ago. But they also lived in freshwater habitats, such as rivers, according to a new study. Environmental changes during the late Cretaceous may have driven mosasaurs to adapt to freshwater areas in North America’s inland sea. Chemical analysis of a mosasaur tooth reveals a surprise Mosasaurs were giant aquatic reptiles that lived 94 to 66 million years ago. While T. rex was the dominant predator on land, mosasaurs were the apex predators of the sea. But scientists from Uppsala University in the Netherlands said on December 12, 2025, that they have new evidence showing mosasaurs also lived in freshwater, in inland rivers. Their diverse habitats suggest they were adapting to a changing environment. In 2022, researchers found a mosasaur tooth at an unexpected location in North Dakota. They recovered it from ancient river deposits alongside a T. rex tooth and the jawbone of a freshwater crocodile-like (or crocodilian) reptile. Plus, the area was known for its fossilized Edmontosaurus duck-billed dinosaurs. How did a seagoing mosasaur’s tooth end up in a freshwater river? In this new study, scientists found answers in the mosasaur’s tooth enamel. A chemical analysis of certain elements revealed that this mosasaur had, in fact, lived in freshwater, not salt water. The researchers published their study in the peer-reviewed journal BMC Zoology on December 12, 2025. Artist’s concept of a mosasaur in a river, having just caught a crocodilian. In this new study, scientists suggest that late Cretaceous mosasaurs could have lived in freshwater. Image via Christopher DiPiazza/ Uppsala University. These giant sea reptiles were apex water predators Mosasaurs were large swimming reptiles of the late Cretaceous, 94 to 66 million years ago. Scientists have found most of their fossils in marine deposits, therefore associating mosasaurs as sea creatures. Along with most dinosaurs, mosasaurs perished 66 million years ago, during the K-Pg extinction event. That’s when a massive asteroid crashed into our planet, causing the extinction of many species. Scientists think the tooth they studied came from a mosasaur of the genus Prognathodon. These creatures had bulky heads with sturdy jaws and teeth. The tooth was about 1.2 inches (30 mm) long. Therefore, based on what they knew about other, more complete mosasaur fossils, the researchers extrapolated the size of this individual to 36 feet (11 meters) in length. That’s about the size of a bus. Per Ahlberg, of Uppsala University in Sweden, is a paper co-author. He said: The size means that the animal would rival the largest killer whales, making it an extraordinary predator to encounter in riverine environments not previously associated with such giant marine reptiles. On the left, different views of the mosasaur tooth. On the right, an image of the T. rex tooth in the ground. The red rectangle shows the location where the mosasaur tooth was recovered. Image via During, M. A. D., et al./ BMC Zoology (CC BY 4.0). Probing the tooth enamel with isotope analysis For some elements, an atom has the same number of protons but a different number of neutrons. These different forms of an element are called isotopes. For example, carbon-12, carbon-13 and carbon-14 are three carbon isotopes. They all have six protons. But they also have six, seven and eight neutrons, respectively. The ratio of isotopes for an element can vary depending on the type of environment. In this study, the scientists looked at three elements: oxygen, strontium and carbon. They found there was more oxygen-16 in their mosasaur’s tooth enamel compared to mosasaurs found in marine environments. Therefore, they concluded, this animal lived in freshwater. Strontium isotope ratios also suggested the same. Melanie During of Vrije University in The Netherlands is the paper’s lead author. She said this about carbon isotope ratios they found: Carbon isotopes in teeth generally reflect what the animal ate. Many mosasaurs have low carbon-13 values because they dive deep. The mosasaur tooth found with the T. rex tooth, on the other hand, has a higher carbon-13 value than all known mosasaurs, dinosaurs and crocodiles, suggesting that it did not dive deep and may sometimes have fed on drowned dinosaurs. The isotope signatures indicated that this mosasaur had inhabited this freshwater riverine environment. When we looked at two additional mosasaur teeth found at nearby, slightly older, sites in North Dakota, we saw similar freshwater signatures. These analyses shows that mosasaurs lived in riverine environments in the final million years before going extinct. Melanie During prepares a sample of the mosasaur tooth for strontium isotope analysis. Via Melanie During/ Uppsala University. An ancient sea in North America During the late Cretaceous, an inland sea divided North America, separating the east and west sides of the continent. This sea is known as the Western Interior Seaway. The amount of freshwater entering this sea increased over time. As a result, the seawater gradually transformed from salt water to brackish water, and then to mostly fresh water. The scientists think that this created a halocline. In other words, salt water – which is heavier because of dissolved salts – formed a layer at the bottom of the sea. Meanwhile, the lighter freshwater sat on top of it. These giant sea reptiles might have lived in freshwater Ahlberg commented that their isotope analysis confirms the theory about halocline conditions in the Western Interior Seaway: For comparison with the mosasaur teeth, we also measured fossils from other marine animals and found a clear difference. All gill-breathing animals had isotope signatures linking them to brackish or salty water, while all lung-breathing animals lacked such signatures. This shows that mosasaurs, which needed to come to the surface to breathe, inhabited the upper freshwater layer and not the lower layer where the water was more saline. Late Cretaceous mosasaurs may have adapted to the changing salinity of the inland sea. During said: Unlike the complex adaptation required to move from freshwater to marine habitats, the reverse adaptation is generally simpler. The scientists cited modern examples of these adaptations. For instance, river dolphins live in freshwater but they’re descended from marine ancestors. The saltwater crocodile in Australia is able to move between freshwater rivers and the sea. Bottom line: Scientists used to think that mosasaurs were exclusively sea-dwellers. But new research suggests that North American late Cretaceous mosasaurs might have lived in freshwater. Source: “King of the Riverside”, a multi-proxy approach offers a new perspective on mosasaurs before their extinction Via Uppsala University Read more: Nanotyrannus, a T. rex mini-me, coexisted with the big guysThe post These giant sea reptiles lived in freshwater rivers, too first appeared on EarthSky.

2025’s AI boom caused huge CO2 emissions and use of water, research finds

Study’s author says society not tech companies paying for environmental impact of AI and asks if this is fairThe AI boom has caused as much carbon dioxide to be released into the atmosphere in 2025 as emitted by the whole of New York City, it has been claimed.The global environmental impact of the rapidly spreading technology has been estimated in research published on Wednesdaywhich also found that AI-related water use now exceeds the entirety of global bottled-water demand. Continue reading...

The AI boom has caused as much carbon dioxide to be released into the atmosphere in 2025 as emitted by the whole of New York City, it has been claimed.The global environmental impact of the rapidly spreading technology has been estimated in research published on Wednesdaywhich also found that AI-related water use now exceeds the entirety of global bottled-water demand.The figures have been compiled by the Dutch academic Alex de Vries-Gao, the founder of Digiconomist, a company that researches the unintended consequences of digital trends. He claimed they are the first attempt to measure the specific effect of artificial intelligence rather than datacentres in general as the use of chatbots such as OpenAI’s ChatGPT and Google’s Gemini soared in 2025.The figures show the estimated greenhouse gas emissions from AI use are also now equivalent to more than 8% of global aviation emissions. His study used technology companies’ own reporting and he called for stricter requirements for them to be more transparent about their climate impact.“The environmental cost of this is pretty huge in absolute terms,” he said. “At the moment society is paying for these costs, not the tech companies. The question is: is that fair? If they are reaping the benefits of this technology, why should they not be paying some of the costs?”De Vries-Gao found that the 2025 carbon footprint of AI systems could be as high as 80m tonnes, while the water used could reach 765bn litres. He said it was the first time AI’s water impact had been estimated and showed that AI water use alone was more than a third higher than previous estimates of all datacentre water use.The figures are published in the academic journal Patterns. The International Energy Agency (IEA) said earlier this year that AI-focused datacentres draw as much electricity as power-thirsty aluminium smelters and datacentre electricity consumption is expected to more than double by 2030.“This is yet more evidence that the public is footing the environmental bill for some of the richest companies on Earth,” said Donald Campbell, the director of advocacy at Foxglove, a UK non-profit that campaigns for fairness in tech. “Worse, it is likely just the tip of the iceberg. The datacentre construction frenzy, driven by generative AI, is only getting started.“Just one of these new ‘hyperscale’ facilities can generate climate emissions equivalent to several international airports. And in the UK alone, there are an estimated 100-200 of them in the planning system,” said Campbell.The IEA has reported that the largest AI-focused datacentres being built today will each consume as much electricity as 2m households with the US accounting for the largest share of datacentre electricity consumption (45%) followed by China (25%) and Europe (15%).The largest datacentre being planned in the UK, at a former coal power station site in Blyth, Northumberland, is expected to emit more than 180,000 tonnes of CO2 a year when at full operation – the equivalent to the amount produced by more than 24,000 homes.In India, where $30bn (£22.5bn) is being invested in datacentres, there are growing concerns that a lack of reliability from the National Grid will mean the construction of huge diesel generator farms for backup power, which the consultancy KPMG this week called “a massive … carbon liability”.Technology companies’ environmental disclosures are often insufficient to assess even the total datacentre impact, never mind isolating AI use, said De Vries-Gao. He noted that when Google recently reported on the impact of its Gemini AI, it did not account for the water used in generating the electricity needed to power it.Google reported that in 2024 it managed to reduce energy emissions from its datacentres by 12% due to new clean energy sources, but it said this summer that achieving its climate goals was “now more complex and challenging across every level – from local to global” and “a key challenge is the slower-than-needed deployment of carbon-free energy technologies at scale”.Google was approached for comment.

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