Fossil-fuel drilling in Alaska’s Arctic National Wildlife Refuge (ANWR) could put polar bears at risk of “lethal” oil spills, new research suggests.
Former president Donald Trump passed a law to enable drilling in the refuge in 2017.
This followed decades of fierce debate between Democrats and Republicans about whether to allow extractive activities in the 7.7m-hectare (19m-acre) expanse, a haven for wildlife sitting on top of an estimated 11bn barrels of oil.
On his first day in office, US president Joe Biden suspended drilling inside the ANWR pending a review. In 2023, his administration cancelled the seven oil and gas licences issued for the reserve under Trump.
However, by law, the Biden administration is still required to hold a second lease sale for the ANWR by December 2024, unless Congress is able to pass legislation undoing the provision set out in Trump’s tax bill.
And with Trump pledging to “drill, baby, drill” if reelected to power later this year, a Republican victory in the next US election would likely see the refuge opened up for oil and gas extraction once again.
The new study, published in Biological Conservation, uses modelling to examine how a series of “worst-case scenario” oil spills could impact polar bears that use the refuge to raise young and feast on bowhead whale carcasses.
The research finds that a serious oil spill inside ANWR could expose up to 38 bears to lethal levels of oil and dozens more to harmful levels.
The risk of exposure to oil spills could be worsened by climate change, which is forcing polar bears to spend greater amounts of time on land in summer as sea ice melts away, the study lead author tells Carbon Brief.
Wild north
Republicans and Democrats have been at loggerheads about whether to drill for oil in the ANWR since the 1970s.
It is located in Alaska’s north slope, directly adjacent to a vast expanse of land that is a hotbed for oil and gas activity (see chart below). This activity includes the highly controversial Willow oil project, which was given final approval by Biden in 2023.

At present, there are currently around 2,000 oil and hazardous substance spills each year in Alaska, in areas where extractive activities already take place.
In 1989, Alaska faced one of the worst environmental disasters in US history when the Exxon Valdez oil tanker ran aground, spilling 11m gallons of oil.
Conservationists have fought to protect the ANWR, a wilderness supporting migratory caribou, wolves, all three North American bear species and hundreds of bird species. The refuge is also the home of the Indigenous Gwich’in and Iñupiat people.
But Republicans have long called for the ANWR to be opened up for drilling. According to Outside Magazine, Republicans have attempted to pass laws to enable drilling inside the ANWR nearly 50 times.
They were finally successful in 2017, when Trump passed a tax bill requiring oil and gas licensing rounds to be held for an area inside the ANWR.
However, on his first day in office in 2021, Biden issued an executive order suspending drilling in the ANWR pending an environmental review.
In 2023, interior secretary Deb Haaland cancelled the seven oil and gas licences issued in the ANWR under Trump, arguing the lease sale was “seriously flawed” for a number of reasons, including failure to “properly quantify downstream greenhouse gas emissions” from the projects.
Despite these efforts, the Biden administration is still required by law to conduct a second lease sale for the ANWR by December 2024, unless Congress is able to pass legislation undoing the provision set out in Trump’s tax bill.
Biden’s presidential campaign promised “no new drilling, period” on federal land and waters, but since entering office he has several times been compelled to hold new licensing rounds in various locations by Congress or the courts.
Dr Ryan Wilson, a wildlife biologist at the US Fish and Wildlife Service in Alaska and lead author of the new study, says his research could help to inform decisions about issuing licences within the ANWR. He tells Carbon Brief:
“There is still an opportunity to inform where development and infrastructure would be allowed for the upcoming lease sale.”
Bear behaviour
For the study, the researchers used modelling to simulate how a series of “worst-case scenario” oil spills could affect polar bears resting in the ANWR.
Polar bears are known to be “especially susceptible to oiling” from spills, the researchers say. This is because oil can damage their fur, leaving them unable to thermoregulate in their harshly cold habitat.
According to the researchers, the ANWR provides an “important habitat” for polar bears from the Southern Beaufort Sea subpopulation, a group of around 900 bears that are currently in decline.
The ANWR hosts the highest density of polar bear dens in the US.

When female polar bears are pregnant, they dig dens in the snow, where they give birth and care for their cubs for the first few months of their life. It is the “most vulnerable period in the polar bear’s life cycle”, according to Polar Bears International. Wilson tells Carbon Brief:
“We’re not sure why maternal polar bears are drawn to the ANWR coastal plain for denning, but records of denning events indicate that over the last 30-40 years there is a higher density of dens there than elsewhere on the northern coast of Alaska.”
The ANWR coastal plain also provides “important resting areas” and a “movement corridor” for bears during autumn, when sea ice is near its lowest levels, the researchers say.
At this time, polar bears feast on the remains of bowhead whale carcasses left behind by hunters from Indigenous communities.
To understand how oil spills might affect polar bears, the researchers simulated spills from three locations along the north-western coast of the ANWR coastal plain: Brownlow Point, Anderson Point and Camden Bay. (These sites are represented with hazard symbols on the map below.)

These regions have the highest oil potential – and are also areas where polar bears come ashore to feed on whale carcasses, according to the researchers.
For each spill site, the researchers simulated an underwater pipeline release of 4,800 barrels of oil every day for six days, totalling 28,000 barrels. They then tracked the path of the oil spill for 50 days.
They simulated the oil spills in autumn, when the maximum number of bears would be using the ANWR.
To estimate how many bears would be exposed, they overlaid trajectories of simulated polar bear movements with the oil spills.
They found that a spill at Brownlow Point would be the most deadly, exposing up to 38 bears to lethal levels of oil. Meanwhile, a spill at Anderson Point would expose up to 28 bears, while a spill at Camden Bay would expose up to 19 bears.
All three of the spills would also expose up to 50-60 bears to sub-lethal levels of oil each week, the researchers find.
Mounting risks
While the simulations track the movements of oil and polar bears over 50 days, they do not consider any efforts that might be made to clean up the oil and take bears to safety, the authors say.
Because of this, they describe their results as a “worst-case scenario that could help managers and oil producers prepare for the most impactful scenario they might encounter with an active oil spill”.
Wilson adds to Carbon Brief that the risk to bears from oil spills has increased because of climate change, which is causing sea ice cover in the Arctic Ocean to rapidly shrink, forcing bears to spend more time on the land surrounding the ocean, including the ANWR:
“The primary risk to polar bears in the Southern Beaufort Sea subpopulation is the loss of sea ice habitat due to climate change. The loss of sea ice is causing more polar bears to come on shore in summer and autumn for longer periods of time, which can lead to more human-polar bear conflicts, putting both bears and people at risk. This increased time on land also leads to greater risk to polar bears from an oil spill in the region.”
The study is “well-conceived and significant” says Prof Andrew Derocher, a polar bear researcher at the University of Alberta in Canada, who was not involved. He tells Carbon Brief:
“The risk to polar bears from an oil spill remains an ongoing concern and for a population like the one in the Southern Beaufort Sea subpopulation, which has already declined in abundance due to climate change, the risk of additional mortality from an oil spill is a serious concern. An oil spill in Alaska as modelled would clearly have significant negative impacts on polar bears there.”
One aspect not covered in the study is how an oil spill would likely affect polar bear prey, including ringed and bearded seals, he says:
“If there were population-level impacts on the seals, this could be an additive impact that would further slow polar bear population recovery. In addition, there is a very high likelihood that polar bears would feed on dead and dying wildlife that were oiled in a spill – specifically, seals, walrus, possibly belugas and birds. Polar bears are consummate scavengers and this secondary form of impact isn’t addressed by this paper.”
He adds the study raises the important issue of being prepared for the environmental impacts of an oil spill in the Arctic:
“I believe that no jurisdiction is prepared for a significant oil spill in the Arctic. Our ability to respond is limited by preparedness, infrastructure and staff.”
The post Alaska refuge drilling could threaten polar bears with ‘lethal’ oil spills appeared first on Carbon Brief.
Alaska refuge drilling could threaten polar bears with ‘lethal’ oil spills
Climate Change
South Africa’s offshore oil push meets grassroots resistance in court
Layers of red dust coat South Africa’s Saldanha Bay, a legacy of the one billion-plus tonnes of iron ore exported from what was once a quiet coastal fishing town in the 1970s. Now the government wants to turn this area into the “oil and gas hub of South Africa”, but opposition from local communities and civil society could force a change of plan.
Since 2014 South Africa has developed a strategy for taking “full advantage” of its marine resources, known as Operation Phakisa. It has resulted in the mapping of more than 95% of the country’s nearly 3,000-kilometre coastline for offshore oil and gas exploration.
The plan seeks to “drill 30 exploration wells in 10 years”, which it estimates could lead to the production of an average of 370,000 barrels of oil and gas per day over 20 years, with Saldanha Bay earmarked as a key logistics hub. It also aims to develop other marine sectors like aquaculture, maritime transport and ocean tourism.
However, two major court cases against the government and oil giants Shell and TotalEnergies have challenged those plans, as coastal residents, allied with national civil society groups, have pushed back against oil concessions held by the multinationals, arguing they were not consulted, and that towns like Saldanha Bay could face social and environmental harms from the fossil fuel extraction.
Melissa Groenink-Groves, programme manager at legal nonprofit Natural Justice, said the cases in South Africa could set a precedent for the whole region. “When communities win in the courts, the successes serve as inspiration for other communities to advocate [for] their rights in their own contexts,” she explained.
She added that the legal challenges to Operation Phakisa also develop climate litigation in the African context, and could impact how environmental impact assessments are conducted going forward.
Globally, as the oil and gas industry sets its sights on the ocean, with over 85% of new discoveries in 2024 made offshore, scientists and activists warn it could threaten marine life and coastal communities, and weaken the ocean’s ability to trap excess heat from the atmosphere, fuelling planetary warming further.

Taking oil companies to court
About 300 kilometres north of Saldanha Bay, the Aukotowa Fisheries Cooperative, backed by nonprofits The Green Connection and Natural Justice, has taken TotalEnergies to court over its plans to drill for oil and gas in a 30,000-square-kilometre block off South Africa’s west coast.
The oil exploration block is in a biodiverse marine area bordering Namibia and South Africa known as the Orange Basin, which is a “highly relevant” sanctuary for endangered species, according to Nelson Mandela University’s Institute for Coastal and Marine Research.
Among other grievances, the cooperative maintains that the company’s environmental impact assessment was flawed, failing to consider the project’s contribution to climate change, and that the government “placed the profits of a multinational corporation above the livelihoods of vulnerable coastal communities”. The Western Cape High Court concluded hearings in late March and is expected to deliver a ruling later this year.
Walter Steenkamp, chairperson of the Aukotowa Cooperative, is concerned that the oil and gas drilling will lead to increased inequality, asking “for whom is the development? Definitely not for us.”
In a written statement, TotalEnergies told Climate Home News that it “is a responsible operator fully committed to complying with all applicable South African legislation”.
Southeast Asia’s fragile grids threaten billions in clean energy investment
Communities and climate impacts at stake
On the other side of the country, along South Africa’s eastern coastline, community-based nonprofit Sustaining the Wild Coast and partner organisations challenged Shell and Impact Africa’s exploration permit, arguing that the firms had failed to consult impacted communities – a legal requirement under South African law.
Co-plaintiff Sinegugu Zukulu also said in 2022 that “oil and gas will lead to more emissions, and in the face of climate change, this is wholly irresponsible”.
Following two rulings against the companies by lower courts, the case is now before South Africa’s highest Constitutional Court, which has reserved judgment since September 2025. A ruling against the companies would be final, effectively ending the exploration permit.
Legal expert Groenink-Groves said oil exploration applications under Operation Phakisa have been “granted largely without properly assessing the devastating impact an oil spill could have on small-scale fishers, the risks of drilling in ultra-deep waters, [and] without accounting for climate change impacts associated with oil and gas exploitation”.
She added that exploration applications have often failed to consider coastal management laws and in some cases, cross-border and regional environmental risks.
Shell and South Africa’s Department of Mineral and Petroleum Resources did not respond to written requests for comment.

South Africa’s offshore oil ambitions
Fishers around South Africa, many of whom have for generations relied on marine resources for survival, say the country’s offshore oil and gas push is sacrificing their livelihoods for profit.
“Why do they want to destroy our heritage? We can’t afford to say yes to oil and gas because the ocean is our source of life,” said Carmelita Mostert, a member of advocacy group Coastal Links and third-generation Saldanha Bay fisher.
Yet with unemployment above 30%, alongside high levels of poverty and wealth inequality, the government sees Operation Phakisa as a vehicle for socioeconomic development.
South Africa’s Minister of Mineral and Petroleum Resources Gwede Mantashe has described the court cases as “anti-development”, and claimed that the environmental organisations are funded by the CIA.
Sifiso Dladla, a campaigner with human rights organisation groundWork, argued that the close relationship between the government and the fossil fuel industry – including its 3% contribution to gross tax revenue – limits the potential success of movements pushing for an inclusive energy system. Politicians “need money to win elections. Mining companies need the government to protect them,” he said.
Patrick Bond, a political economist and sociology professor at the University of Johannesburg, said Operation Phakisa only makes economic sense if its social and environmental harms are ignored, adding that “if a genuine social cost of carbon analysis were done in any African fossil fuel project, there would be few – if any – able to justify the projects economically”.
At a global scale, Bond said oil multinationals have the financial backing of European governments – including France’s $2.8 billion stake in TotalEnergies – which can help make local resistance more effective where it has international allies to amplify the messages.
For Saldanha Bay fisher Mostert, the fight is about protecting the livelihoods of coastal communities. “It is my hope that we can stand strong and protest,” she said. “If oil and gas is not allowed, our lives will be much easier and better – but if oil and gas goes ahead we will be in absolute agony.”
The post South Africa’s offshore oil push meets grassroots resistance in court appeared first on Climate Home News.
South Africa’s offshore oil push meets grassroots resistance in court
Climate Change
Millions of kilograms of marine life taken from Australia’s marine protected areas every year, FOI finds
SYDNEY, Tuesday 11 August 2026 — New data obtained by Greenpeace Australia Pacific has found millions of kilograms of marine life are being taken from Australian marine parks by commercial fishers annually, as the government begins its review of the country’s Marine Parks Network.
The data, released to Greenpeace in response to a Freedom of Information request, relates to 18 of Australia’s 60 Commonwealth marine parks, and shows almost 2.2 million kg of marine life is being fished each year, raising concerns about the true catch numbers across all marine protected areas.
Greenpeace is calling for the Labor government to use the once-in-a-decade Marine Parks Network review, announced last fortnight, to ban industrial activities, including bottom trawling, longlining and oil and gas mining, from Australia’s Marine Parks Network, and increase fully-protected ocean sanctuaries within the network.
Elle Lawless, Senior Campaigner at Greenpeace Australia Pacific, said:
“It’s chilling to think of the true scale of destruction happening inside all of Australia’s marine parks, and how much of our precious ocean wildlife, like dolphins, turtles or seabirds, could be pulled out of protected areas as bycatch.
“We’re talking about 6,600 kilograms of wildlife in one day, and that does not include what’s caught in the other 42 marine parks, many of which allow destructive fishing like longlining.
“Australia has made significant progress in securing 52% of its oceans in marine parks; however, this intent is undermined by zones that allow damaging industrial fishing activities, such as bottom trawling and longlining. The review of Australia’s Marine Parks Network is a critical opportunity to fix what isn’t working and finally give our oceans the real protection they deserve.
You wouldn’t expect someone to bulldoze a national park on land, so why should they be allowed to trawl in a marine park?”
“Greenpeace Australia Pacific welcomes the Albanese Government’s review of the Commonwealth Marine Parks Network as a rare opportunity to strengthen our marine parks and ban industrial fishing in Australia’s marine protected areas.”
The documents reveal that the south-west network has the largest catch volume, at 887,160kg per year, followed by the Coral Sea network, which extends out from the Great Barrier Reef, losing significant wildlife at 808,840kg annually.
—ENDS—
Notes:
- More than half of Australia’s Marine Parks Network allow extractive industries, including industrial fishing and oil and gas mining.
- The data, supplied by the Department of Agriculture, Fisheries and Forestry, does not specify how much of the catch is fish or bycatch, like non-target fish, turtles or seabirds, and is available on request.
- Read Greenpeace’s new report: Trawling the Bottom Line
Climate Change
Marine Parks Explained
Australia’s network of marine parks is the largest in the world, covering more than half (52%) of Australia’s Commonwealth waters. You could be forgiven for assuming that a marine park is much like a national park on land: a highly protected place where people can enjoy nature while conservation efforts help habitats recover and wildlife thrive. You wouldn’t expect someone to bulldoze a national park, so why should they be allowed to bottom trawl in a marine park?
The reality is that not all marine parks are equally protected. Australia’s Marine Parks Network is divided into different zoning categories, with each zone determining which activities are permitted and the level of protection provided.
More than half of the Commonwealth Marine Parks Network allows industrial activities like oil and gas mining, and industrial fishing.
Our survival, and the survival of our planet, depends on the ocean. The ocean produces more oxygen than all of our forests combined, sustains communities and regulates the earth’s temperature. It’s home to wondrous wildlife and important ecosystems like coral reefs and kelp forests.
We love our big blue backyard
Australia’s ocean is teeming with life that is found nowhere else on earth. Schools of colourful fish, vibrant coral reefs, endemic shark nurseries, pods of dolphins, families of whales, playful seal pups and threatened Jurassic-era turtles call Australian waters home.
Since time began, from the turquoise waves to the deep blue, the ocean has connected our shorelines and communities, fed us, guided us and grounded us. We are intrinsically connected to our big blue backyard – more than 85% of us live within 50km of the shoreline. For tens of thousands of years, people have lived in harmony with the ocean and the wildlife within it, caring for and being sustained by its rich waters. Australia’s waters are some of the most unique and abundant places on Earth but our Marine Parks Network is falling short to properly protect them.
Australia’s marine parks aren’t living up to their name

The Australian Commonwealth Marine Parks Network covers commonwealth waters 5.5km from the coast. The network is divided into 7 regional management areas, overall the network contains 60 marine parks. Zoning types determine what activities are allowed in each area. Over half of the network allows industrial activities, risking our most precious and threatened ocean wildlife.
Within many of our marine parks, destructive industries are allowed to fish, trawl, dig and mine using barbaric and cruel methods. Here are some of the zones explained:
- Bottom Trawling: Special Purpose (trawl) zones allow bottom trawling. This covers 10 marine parks totalling almost 13 million hectares. Bottom trawlers bulldoze the seafloor with weighted nets, deforesting our underwater forests; a cruel, indiscriminate and inefficient way to fish.
- Other Industrial Fishing: Includes “Habitat Protection Zones, ““Multi Use Zones” and “Special Purpose Zones.” Fishing methods vary from park to park but many marine parks in these zones allow industrial fishing like longlining. Longlining involves setting lines that can be 100km long, bristling with deadly hooks designed to catch a specific fish species. But longlining is not a selective method of fishing – significant numbers of sharks, rays, turtles, dolphins and seabirds can be harmed or killed as bycatch in the process.
- Oil and Gas Mining: Many “Special Purpose” and “Multi Use” zones allow seismic blasting and oil and gas mining. 30 marine parks or 65 million hectares of Australia’s highest conservation value areas for ocean wildlife are open for mining and exploration of oil and gas.
- Ocean Sanctuaries: National Park and Sanctuary zones are fully and highly protected marine parks designed to conserve wildlife and their habitat, where fishing, mining, and other industrial activities are not allowed.
Industrial fishing is one of the biggest threats to the ocean

In May, Greenpeace Australia Pacific sailed our campaigning vessel Oceania through some of Australia’s most beautiful and threatened marine parks. Our crew visited Jervis and Hunter marine parks to document their beauty, showcase what’s at risk and aim to expose the industrial fishing activities in these protected waters. Both of these marine parks allow bottom trawling and longlining methods of industrial fishing.
Industrial fishing is ripping the ocean apart across the planet. Longlining, also known as longline fishing, is an industrial fishing method that involves the use of a fishing line with thousands of baited hooks. These fishing lines can stretch over 100 kilometers in length and are set to capture a fish species, often tuna or billfish species. But it is not a selective method of fishing and often results in significant bycatch. This includes a range of non-target species like sharks, rays, sea turtles, marine mammals, and seabirds which are often injured or killed as bycatch.
Bottom trawling involves dragging heavy weighted nets along the ocean floor. This fishing method is popular with commercial fishing companies, because it makes it easy to catch large quantities of fish in one go. But it also damages the seafloor, releasing carbon and can kill or injure non-target ocean life like coral, fur seals, dolphins and seabirds. You may have watched the reality of bottom trawling (and the benefits of ocean sanctuaries) in Ocean with David Attenborough, if not, add it to your watch list!
Fully protected ocean sanctuaries that ban industrial fishing and mining can protect ocean wildlife and underwater wonderlands for generations to come. Vast, robust sanctuaries create blue havens where ocean wildlife are safe from nets and hooks, and can truly rest, recover, thrive and replenish out into the surrounding waters. Ocean sanctuaries ensure a healthy ocean full of life.
A once-in-a-decade chance to fix what’s falling short
We have a unique opportunity to turn the tide.
The Australian Government is asking for your feedback on how our Commonwealth Marine Parks Network is managed. This is our once-in-a-decade chance to protect ocean wildlife, ban industrial fishing and create more ocean sanctuaries.
As part of the review the Government is asking for submissions from the public to hear from you on what improvements are needed to better protect our vast network of marine parks. Writing a submission is a powerful way to influence government decisions and create real change.
This is the moment to ban industrial activities like bottom trawling and oil and gas mining. But only if they hear from YOU. Add your name!
Greenpeace is calling on the Australian government to:
1. Ban industrial activities from Australia’s Marine Parks Network: Ban industrial activities, such as industrial fishing, seismic blasting and oil and gas mining, from Australia’s marine parks.
2. Create more ocean sanctuaries: Increase fully protected sanctuaries in Australia’s marine parks based on science principles.
3. Connect Australia’s Marine Parks Network to the High Seas: mCreate seascape connectivity by linking Australian marine parks to new high seas ocean sanctuaries.
References
Substantiation that more than half of the Marine Parks Network permits industrial activity comes from a peer-reviewed systematic literature review (Phillips et al. 2025, PLOS One, https://doi.org/10.1371/journal.pone.0307324). The study found that within the Commonwealth Marine Parks Network specifically, “all zones are considered partially protected areas, meaning areas where extractive activities are permitted, except ‘Pink zones’ (Preservation Zones; IUCN Ia) and ‘Green Zones’ (IUCN II).” In other words, every Commonwealth marine park zone type other than the network’s strict no-take sanctuary and national park zones (IUCN Ia and II) permits some form of extractive industrial activity. Since no-take zones are the minority zone type across the network by area, this supports the conclusion that the majority of the network’s area is zoned to permit industrial activity.
DCCEEW Australian Marine Parks spatial dataset (https://fed.dcceew.gov.au/datasets/erin::australian-marine-parks/explore), filtered by zone type. This confirms that 38.43% of the network’s area is zoned as Sanctuary or National Park zones (IUCN Ia and II). These are the no-take categories excluded from the peer-reviewed study’s definition of partially protected/industrial-permitting zones. The remaining 61.57% of the network falls within the zone categories the study classifies as permitting industrial activity (per The MPA Guide definition of “industrial” applied in Phillips et al. 2025), directly corroborating the peer-reviewed finding with current Commonwealth-specific spatial data.
For further information on activities permitted within the Marine Parks Network Zoning, you can refer to the Management Plans zoning and rules for each Marine Parks Network area, for example: Temperate East, Coral Sea, North.
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