Connect with us

Published

on

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.

Oil and gas activity in Alaska’s north slope. Credit: Alaska Department of Natural Resources
Oil and gas activity in Alaska’s north slope. Credit: Alaska Department of Natural Resources

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.

A mother polar bear with two cubs.
A mother polar bear with two cubs. Credit: robert goodell / Alamy Stock Photo

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.)

Region of simulated oil spills (hazard symbols) within the ANWR. Grey shading is used to highlight oil potential. Credit: Wilson et al. (2024)
Region of simulated oil spills (hazard symbols) within the ANWR. Grey shading is used to highlight oil potential. Credit: Wilson et al. (2024)

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

Continue Reading

Climate Change

Proposal for ‘Hyperscale’ data centre in remote Northern Territory demonstrates need for urgent moratorium

Published

on

SYDNEY, Wednesday 1 July 2026 — The proposal for the ‘Project Ares’ data centre in remote Northern Territory, which would be powered by off-grid gas and renewables, has prompted renewed calls from Greenpeace for an urgent moratorium, citing serious concerns about emissions and environmental harm.

The application for the project under the EPBC Act reveals the gas-fired generation for the project would be approximately 1,038MW at full build-out, which would more than double the NT’s current gas-fired generating capacity.

A recent report by Greenpeace Australia Pacific and independent expert Ketan Joshi, Energy Vampires: the AI data centres draining Australia, revealed how the frenzied rollout of AI data centres in Australia is set to derail the renewable energy transition, entrench gas and turbocharge climate pollution.

Solaye Snider, Campaigner at Greenpeace Australia Pacific, said: “Proposals like Project Ares, which would have significant off-grid gas powered generation and emissions, should not be moving along while there are still zero binding regulations to limit the impacts of AI data centres on our communities and environment.

“This hyperscale project proposes massive new off-grid gas infrastructure, making a mockery of the Federal Government’s unenforceable ‘expectations’ that data centres will cover their own power use with renewables. Communities will pay the price for the data centre industry’s endless hunger for energy at any cost.

“This proposal also raises serious questions about where this new gas would come from. Could it come from fracking the Beetaloo? Communities deserve to have the full picture before this project is approved.

“The Australian Government is asleep at the wheel when it comes to the rapid roll-out of AI data centres. We need an urgent moratorium on the construction and approval of new data centres, so our government can take appropriate time to legislate the regulations and safeguards we so desperately need.”

-ENDS-

Media contact

Lucy Keller on 0491 135 308 or lucy.keller@greenpeace.org

Proposal for ‘Hyperscale’ data centre in remote Northern Territory demonstrates need for urgent moratorium

Continue Reading

Climate Change

Can giant batteries unlock Africa’s green industrial future?

Published

on

When Tropical Storm Ana made landfall in Malawi in 2022, it hit the landlocked country’s electricity system hard, destroying a third of its hydropower capacity and causing nationwide system shutdowns.

Even before the storm, Malawi’s power supply – generated mostly from renewables including solar and hydro – had been unreliable for many years, suffering from persistent outages.

The Malawian government is now hoping to improve the stability of its grid power with the construction of a battery energy storage system (BESS) in its capital that will charge up with surplus electricity generated when the sun is shining and hydropower dams are running, and release it when needed.

More than 80% of Malawi’s electricity comes from renewables and the country has been expanding capacity by adding more solar power while decommissioning 78 megawatts (MW) of diesel generation. But climatic impacts such as cyclones disrupt the grid and threaten to reverse energy transition gains.

West Africa’s first lithium mine awaits go-ahead as Ghana seeks better deal

To ensure a more stable supply, Malawi is building the 20 MW/30 megawatt hour (MWh) battery storage system in Lilongwe with support from the Global Energy Alliance (GEA), under Mission 300 – an initiative led by development banks and their partners to connect 300 million Africans to electricity by 2030.

The project in Malawi aims to stabilise the country’s grid, smooth its intermittent power supply, and reduce its reliance on diesel generators, as well as averting about 10,000 tonnes of carbon emissions per year.

Battery energy storage systems act like giant power banks, absorbing clean electricity during periods of lower demand and releasing it for use when demand is high or generation drops. A typical BESS includes battery packs, inverters that allow electricity to flow between the batteries and the grid, transformers, and cooling and safety systems.

Damola Omole, director of the ‘Grids of the Future, Africa’ programme at the GEA, a philanthropic organisation, said BESS offers the “flexibility needed to smoothly integrate high levels of variable renewables” into the power grid. In doing so, it can reduce reliance on expensive diesel generation and protect consumers and industries from rising energy costs, he added.

Can BESS drive Africa’s industrialisation?

As calls to develop local green industries grow louder in Africa, Omole said there is a need to prioritise upgrading national grids with BESS so they can “transmit reliable, cost-reflective power directly to commercial clusters”.

While financiers previously doubted that intermittent solar and wind could meet the needs of industrial production, utility-scale BESS has demonstrated that renewables can deliver “predictable, steady output just like traditional fossil-fuel baseload power”, he added.

An electrical power engineer performs preventative maintenance using a digital voltmeter to monitor battery charge efficiency. (Photo: Nitat Termmee/ Getty Images)

In recent years, African leaders, including William Ruto of Kenya, Felix Tshisekedi of the Democratic Republic of Congo (DRC) and Emmerson Mnangagwa of Zimbabwe, have called for the continent to use the energy transition to drive green industrialisation and create value from its resources at home.

At a mining investment conference in Nairobi in April, Ruto said Africa had stayed at the bottom of the value chain for too long but would now collaborate to process its minerals within the continent. “We will refine them here and we will manufacture them here,” he told African ministers and business executives.

Kenya seeks regional coordination to build African mineral value chains

However, deploying energy at scale to advance this industrial ambition has long been a problem, while about 600 million Africans still lack access to electricity. BESS could therefore become a critical technology in the continent’s development drive, experts say.

Michael Iwu, West Africa business development manager at Empower New Energy, which finances and co-develops renewable energy, said BESS is challenging the narrative that solar and wind power alone cannot provide enough reliable electricity to run factories and other energy-intensive industries. Modern battery systems can now support business operations for several hours, helping maintain production during grid outages, he added.

For GEA’s Omole, the key question has shifted to how quickly countries can build the battery storage, grid infrastructure and market frameworks needed to unlock the potential of renewables.

BESS to help renewables displace fossil fuels

While BESS is still in its initial stages of deployment in Africa, interest is growing as countries look for ways to make renewable energy more reliable.

South Africa is leading with the largest and first of its kind utility-scale BESS on the continent. With the capacity to discharge up to five uninterrupted hours of power, the system is keeping homes and businesses running in Worcester, a southwestern town of more than 100,000 people.

Egypt is also investing heavily in battery storage. In 2025, the country launched its first utility-scale BESS, a 300-MWh facility integrated with a 500 MW solar plant in the southern city of Aswan. It has also committed more than $1 billion to strengthen its electricity grid and update regulation to support battery storage projects.

Africa needs more than export bans to cash in on critical minerals, experts say

Falling battery prices are helping drive the rapid deployment of energy storage. According to BloombergNEF, battery packs for stationary storage (used in BESS) cost an average of $70 per kilowatt-hour in 2025, down 45% from 2024.

Soon the role of BESS in supporting the grid integration of wind and solar could reduce reliance on fossil fuels and help the world meet ambitious climate goals, according to a GEA report released in April.

Stephen Nicholls, director of South-Africa based energy think-tank African Energy Futures, said the rapid pace of technological development and the falling costs of BESS are attracting growing attention.

He said improvements in storage duration could further strengthen the role of renewables in industrial power systems. While most commercial and utility-scale battery systems currently provide around four to eight hours of storage, Nicholls said researchers are developing units capable of storing electricity for extended periods.

“The cheaper the storage and the longer the storage, the more [BESS] will replace fossil fuels like gas,” he added.

Workers are busy on a product at a Polarium energy-storage facility, where they make energy storage and optimization solutions, built on lithium-ion battery technology for businesses within telecom, commercial and industrial facilities across the world, in Cape Town, South Africa, April 5, 2023. (Photo: REUTERS/Esa Alexander)

Workers are busy on a product at a Polarium energy-storage facility, where they make energy storage and optimization solutions, built on lithium-ion battery technology for businesses within telecom, commercial and industrial facilities across the world, in Cape Town, South Africa, April 5, 2023. (Photo: REUTERS/Esa Alexander)

Limited awareness and data

However, significant obstacles to BESS deployment still stand in the way of its massive potential. Iwu of Empower New Energy said limited awareness of utility-scale BESS, as well as concerns about financing and a lack of long-term performance data continue to slow investment across Africa. 

Governments and developers need to build more pilot projects and demonstration sites to generate evidence of the technology’s value and benefits and boost confidence among investors and policymakers, he added. To scale BESS, we need to “keep amassing this [evidence] data and keep talking about it and exploring it,” Iwu said.

Two to tango: How governments can unlock private investment for national climate goals

To help address those barriers, Omole said a BESS Consortium under the Global Energy Alliance is working with governments, development banks and other technical partners to de-risk the sector for private financiers by generating evidence from early projects, mobilising public finance to attract private capital, and introducing policies that make battery storage commercially viable.

“This coordinated action helps African nations bypass legacy infrastructure constraints, integrate massive volumes of clean energy, and secure the reliable power required for large-scale industrialisation,” Omole explained.

The post Can giant batteries unlock Africa’s green industrial future? appeared first on Climate Home News.

Can giant batteries unlock Africa’s green industrial future?

Continue Reading

Climate Change

With extreme heat now a public health crisis, local data can save lives

Published

on

Eric Mackres is senior manager of urban analytics for the WRI Ross Center for Sustainable Cities and attended London Climate Action Week during the June 2026 heatwave. Usama Bilal is an associate professor of epidemiology and co-director of the Urban Health Collaborative at Drexel University.

As thousands gathered in London for one of the year’s largest climate gatherings last week, Western Europe faced its most severe heatwave ever recorded. The irony was not lost.

Across Europe, over a dozen countries issued urgent heat warnings and Spain registered significant deaths. In London, where air conditioning is rare in buildings and on trains and buses, temperatures soared past 36 degrees Celsius (97F) and schools closed early. The mayor announced the city’s first heat action plan – an important step.

Extreme heat is now a public health crisis for many of the world’s cities, as the urban heat island effect intensifies dangerous temperatures – and it’s growing worse. Around 500,000 people die from extreme heat every year. As global temperatures rise, and with a severe El Niño getting underway, even more people will die and be hospitalised unless cities act soon.

But most cities are still taking a far too one-sized-fits-all approach to tackling heat, looking only at temperatures and not its local effects on people and their health.

People experience heat differently

How extreme heat affects people’s health can vary widely across a country and city, depending on their environment and demographics. Cities can save far more lives and prevent more hospitalisations by taking a tailored approach, using data to understand who’s most vulnerable and directing solutions toward them.

The good news: better data now exists that enable cities to pinpoint who’s most at risk. And that data can inform customised adaptation strategies to save lives. Indeed, the future of cities will hinge on their ability to deliver solutions to extreme heat tailored to at-risk people and neighborhoods.

Comment: Climate adaptation in Africa needs investment, not imported solutions

First, cities should start by measuring heat’s risks to people’s health locally. Our work in Brazil and across Latin America shows big differences in what temperatures are dangerous and how quickly risks escalate at higher temperatures. These variations exist between cities, between demographic groups and between neighbourhoods.

But it’s not as simple as finding the hottest places. In temperate Porto Alegre, in southern Brazil, a person’s risk of death increases by 25% at temperatures of 27 degrees Celsius (81F). In tropical Teresina, in northern Brazil, which is hot year-round, the same temperature does not elevate the risk of death. At 32 degrees Celsius (90F), a person’s risk of death increases by a milder 10%.

These differences also exist within cities where the climate is the same. Elderly people, the very young, lower-income communities and those without air-conditioning and shaded green spaces are all more likely to get sick, be hospitalised, or die from heat. Areas with more trees and green spaces usually have lower temperatures, and therefore lower impacts of heat.

Targeted heat alerts

Second, cities can use this data to develop early warning systems and outreach campaigns that give people more targeted heat alerts. Research in the UK found that the elderly, despite being among the most at-risk, often were unable to heed warnings during the 2022 heatwave. Well-designed heat warning systems and city responses strengthen people’s trust in health services. They can change people’s behaviours and better prepare municipal services, helping reduce illness, hospital visits and deaths.

Rio de Janeiro adopted a heat alert system in 2024 with five alert levels based on past heatwaves’ impacts on health and forecasts of when temperature and humidity will hit those dangerous levels again. The alert levels activate services like cooling centres, extra public drinking water, and changes to outdoor events. When a heatwave struck during Carnival in 2025, the city was able to deploy resources to protect and warn people while still allowing events to go on.

WHO issues new guidance on heat-health action plans, as El Niño sets in

Finally, cities should use local heat data to target cooling solutions to where they can help people the most. Solutions like tree cover, shade structures and cool roofs lower temperatures and can provide targeted relief for the most vulnerable people, like outdoor workers and those who travel by foot, bike or public transit.

In Florianópolis, Brazil, we helped the local government use heat impact modeling to design a green corridor and urban forestry project that will reduce pedestrians’ heat stress up to 7 degrees C. In Hermosillo, Mexico, our researchers worked with the city and found that certain neighbourhoods could feel up to 14 degrees C hotter than the shaded city center. A park is now under construction that will bring better shade and heat relief to one of the city’s most at-risk areas.

A modular street shade structure on display during an event at New York Climate Action Week on Governors Island, NYC in September 2025. (Photo: Megan Rowling)

A modular street shade structure on display during an event at New York Climate Action Week on Governors Island, NYC in September 2025. (Photo: Megan Rowling)

Connecting health and climate planning

Momentum to address extreme heat in cities is growing, from both national and local governments. At last year’s UN climate summit in Brazil, the Belém Health Action Plan saw 30 national health ministries commit to build climate-resilient health systems based on local data and evidence-based policies.

And over 160 local governments joined the Beat the Heat initiative, committing to develop urban heat action plans and deliver passive cooling projects to reduce health risks.

But there’s still a disconnect between health, urban and climate officials. Only 23% of World Meteorological Organization member countries integrate weather information into health surveillance systems. Heat-health impact models, though increasingly easy to scale, are not yet built for every city. Some cities still need to collect local data for specific demographics and neighbourhoods – and many need support.

National and local governments will need to partner on this tailored approach. It will require integrating local heat and health data into public health systems, city planning, infrastructure, and disaster preparedness.

We have the data to know who will be most impacted by extreme heat when – and the solutions to keep people alive and out of the hospital. It’s time for governments to use them.

The post With extreme heat now a public health crisis, local data can save lives appeared first on Climate Home News.

With extreme heat now a public health crisis, local data can save lives

Continue Reading

Trending

Copyright © 2022 BreakingClimateChange.com