Welcome to Carbon Brief’s DeBriefed.
An essential guide to the week’s key developments relating to climate change.
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This week
UN General Assembly
FOSSIL FAILURE: At the UN’s 78th general assembly in New York, secretary general António Guterres said that “the fossil fuel age has failed”, but “stopped short of calling on specific countries”, the New York Times reported. On Wednesday, Guterres invited leaders from 34 countries to speak at the first-ever “climate ambition” summit “in recognition of their strong action on climate change” – notably omitting China, the US and the United Arab Emirates, Reuters reported.
FINANCING THE FIGHT: Nigerian president Bola Tinubu told the general assembly that Africa’s fight against climate change must happen “on our own terms”, namely, alongside “overall economic efforts”, reported Nigerian daily the Premium Times. Surangel Whipps Jr, president of Palau, called for “scaled-up climate finance that adequately recognise[s] the context” of small island developing states, Pacific News Service wrote.
BREAKING THE BANK: On Sunday, an estimated 75,000 people took to the streets of New York to demand stronger action on climate change. The protest was “far more focused on fossil fuels and the industry than previous marches” had been, the Associated Press wrote. The next day, more than 100 protesters were arrested outside New York’s Federal Reserve Bank, Inside Climate News reported.
PM rolls back UK climate commitments
UK U-TURN: UK prime minister Rishi Sunak has made a “major shift on green policies”, announcing “exemptions and delays” to a range of plans and programmes, BBC News reported. Among them is a five-year postponement of the ban on new petrol and diesel cars, originally set for 2030. The prime minister “denied he was ‘watering down’ the government’s net-zero commitments”, the outlet added.
‘IN JEOPARDY’: Carbon Brief analysis showed that these policy changes “could put the UK’s legally binding emissions targets in jeopardy”, as well as its commitment under the Paris Agreement. Carbon Brief has also just published an in-depth Q&A which includes a factcheck of Sunak’s claims and policy announcements. Despite Sunak’s emphasis on being “honest with the public” about the “unacceptable costs” of net-zero, the assessment makes it clear that many of his statements were misleading and his policy changes could cost consumers billions of pounds.
Around the world
- CLIMATE (RE)COMMITMENT: Brazil’s government has approved amending the country’s pledge under the Paris Agreement returning it “to the level of climate ambition of 2015”, according to the Brazilian newspaper Folha de São Paulo.
- ‘LEGAL BLITZKRIEG’: California has filed a lawsuit against five oil majors, seeking billions of dollars to cover future damages from climate change. The state’s suit alleges wrongdoing on many counts, including misleading the public, violating state pollution regulations and defrauding investors, San Jose’s Mercury News reported.
- LIBYA’S UNREST: “Hundreds of protesters” in Libya are accusing their government of neglect after more than 10,000 people died in catastrophic flooding last week, the North Africa Journal said. Analysis covered by Carbon Brief has shown that the extreme rainfall was made up to 50% more intense by climate change.
- OFF-TARGET: Climate change and conflict mean the world is “likely to miss” targets to end the spread of HIV/Aids, tuberculosis and malaria by 2030, Reuters wrote. Warmer temperatures are expanding the range of disease-carrying mosquitoes, while extreme weather events strain health services and interrupt public-health programmes.
- BUSHFIRES BURN: Several parts of Australia are facing record or near-record springtime temperatures, while dozens of fires burn across New South Wales in what the Sydney Morning Herald described as “a taste of the hot, dry summer ahead”.
- GOING GEOTHERMAL: The World Geothermal Congress concluded on Sunday with the launch of the Beijing Declaration, which proposed “principles and recommendations for the sustainable development of the global geothermal industry”, Chinese state-run news agency Xinhua reported.
60
Number of countries that saw marches, rallies and other actions over 15-17 September to demand fossil fuel phase-out, according to the campaign group the Global Fight to End Fossil Fuels.
Latest climate research
- Sea-level rise already delays US commuters in coastal areas by 22 minutes per year, which could increase to 200-650 minutes by 2060, according to a study in Environmental Research: Climate.
- A new paper in Geophysical Research Letters showed skill in predicting marine heatwaves in the Arabian Sea up to seven months in advance.
- Shading shallow-water coral reefs periodically can decrease light stress and slow bleaching, said new research in Frontiers in Marine Science.
(For more, see Carbon Brief’s in-depth daily summaries of the top climate news stories on Monday, Tuesday, Wednesday, Thursday and Friday.)
Captured

The sea ice extent around Antarctica is more than 1.5m square kilometres lower than the September average, satellite data has revealed. This extent is much smaller than has ever been measured in the austral winter, a record that goes back to 1979. “It’s so far outside anything we’ve seen, it’s almost mind-blowing,” Dr Walter Meier, senior research scientist at the US National Snow and Ice Data Center, told BBC News. Meier is “not optimistic that the sea ice will recover to a significant degree”, the outlet added.
Spotlight
Three ways to better protect the ocean
A new report from the OSPAR Commission, which is responsible for protecting the marine environment of the north-east Atlantic, assessed the status and health of that part of the ocean and its neighbouring seas. Here, Carbon Brief unpacks three key takeaways from the report.
Climate change and ocean acidification are “driving major changes” in the north-east Atlantic.
A range of climate impacts are already being felt across the north-east Atlantic, from marine heatwaves and sea-level rise to deoxygenation and changes in the ocean circulation. “While the root cause is global, the effects are felt at more local scales,” the report said. For example, it identified the Arctic waters as warming more rapidly than elsewhere in the region.
Local changes can have knock-on effects, it added, such as shifts in wind patterns and strength due to changes in Arctic sea-ice extent. Warming also affects ecosystems, with the report providing evidence of changes in plankton, “which, in turn, trigger changes at other trophic levels”.
Ocean acidification is also having both direct and indirect impacts on marine ecosystems in the region, “with significant negative impacts for calcareous or shelled organisms”, the report concluded.
While supporting improved ocean resilience is important, it cannot come at the expense of broader climate action, said Dr Bee Berx, one of the lead authors of the climate change assessment within the report.
She told Carbon Brief: “Reducing global warming in compliance with the UNFCCC Paris Agreement would be the main way to ensure the impacts of marine climate change and ocean acidification are minimised.”
Human pressures on marine ecosystems “reduce their resilience to climate change”.
Besides climate change, the world’s oceans face a multitude of other human impacts. Some of these pressures have eased over the past several decades.
Pollution from the oil and gas industries operating in the north-east Atlantic has waned and the amount of marine litter has diminished, despite increasing use of plastics overall. Excessive nutrient inputs from agriculture and wastewater have also decreased over much of the OSPAR region – although not everywhere.
At the same time, pressures, such as noise pollution from shipping traffic and contamination by pharmaceuticals, have increased. According to the report, such pressures weaken marine ecosystems and make them less resilient to the effects of climate change and ocean acidification.
There is “emerging understanding of the complex interactions between cumulative pressures”, Berx told Carbon Brief. Managing those pressures will be a “critical tool for the OSPAR countries to support climate change resilience”, she added.
“Collective trends point to declining biodiversity”, despite gains for some species.
Understanding ecosystem change “is crucially important for developing effective and efficient management”, the report said. It noted that “collective trends” indicate continuing biodiversity decline and ecosystem degradation, despite measures that OSPAR countries have taken.
The report did note some bright spots for biodiversity. For example, the introduction of invasive alien species – one of the five major drivers of biodiversity loss – to the OSPAR region has slowed.
But, at the same time, the status of most of the threatened species assessed by OSPAR was either “not good” or “unknown”. Species are harmed by both direct and indirect pressures, with localised pressures such as habitat loss exacerbated by climate change.
Watch, read, listen
THREE STRIKES: The historic labour action by the US United Auto Workers union is inextricably linked to the future of electric vehicles, Grist wrote.
PAKISTAN’S PROGNOSIS: The Third Pole interviewed Sherry Rehman, former climate minister of Pakistan, on the challenges her country faces under increasing uncertainty.
OLD FOREST, NEW APPROACH: Garry Merkel, a Canadian forester and a member of the Tahltan Nation, discussed holistic forest management on the YourForest podcast.
Coming up
- 25-27 September: 32nd session of the North American Forest Commission, Fredericton, Canada
- 26-28 September: Second annual forum on environmental defenders in Latin America and the Caribbean, Panama City
- 28 September: IEA critical minerals and clean energy summit, Paris
- 30 September: Maldives presidential election (2nd round)
Pick of the jobs
- Inside Climate News, senior editor | Salary: $85,000-$100,000. Location: Remote (US)
- National Taiwan University, atmospheric sciences faculty | Salary: up to $51,000. Location: Taipei
- Global Green Growth Institute, climate finance technical officer | Salary: from $64,920. Location: Suva, Fiji
- UN Environment Programme, climate risk analyst | Salary: Unknown. Location: Santo Domingo, Dominican Republic
DeBriefed is written in rotation by Carbon Brief’s team and edited by Daisy Dunne. Please send any tips or feedback to debriefed@carbonbrief.org
The post DeBriefed 22 September 2023: UN’s first ‘climate-ambition’ summit; UK govt’s climate U-turn; How to protect the north-east Atlantic appeared first on Carbon Brief.
Climate Change
After another battery startup bankruptcy, can Europe ever cut reliance on China?
Just one year ago, Lars Christian Bacher said his career embodied the energy transition – moving from CFO of Norway’s state-controlled oil company Equinor to leading one of Europe’s few home-grown battery makers.
Morrow Batteries was on a mission to compete alongside the industry’s dominant Asian, mainly Chinese, battery producers as Europe sought to reduce its reliance on imports, Bacher told a group of foreign journalists on a sunny day in Oslo last May.
But seven months later, Bacher stepped down as CEO, and earlier this month, Morrow Batteries said it had filed for bankruptcy after its financial situation “deteriorated”.
Coming a year after Swedish battery maker Northvolt filed for bankruptcy, industry analysts said Morrow’s descent into financial difficulties would likely deal a fresh blow to investor confidence in European battery manufacturers – potentially keeping Europe dependent on Chinese energy transition technology for longer.
While bigger European battery makers such as ACC, Verkor and PowerCo – linked to car-makers Stellantis, Renault and Volkswagen, respectively – are still in business, Europe needs to reduce its reliance on China, experts say.
“It’s just such a critical technology that you cannot rely on somebody else,” said Julia Poliscanova, batteries lead at the Brussels-based advocacy group Transport & Environment.

State-backed eco-batteries
Established in 2020, Morrow Batteries expanded its workforce to more than 200 and has the ability to produce three million batteries a year at its factory in the forest outside the coastal city of Arendal, on Norway’s picturesque southern tip.
Investors in the startup included industrial engineering companies Siemens and ABB, and it received a 550 million krone ($59 million) loan from state development agency Innovation Norway. State-owned energy and investment companies were also among its shareholders.
Morrow has promoted its batteries as particularly sustainable, with solar and hydropower supplying energy to the factory. Its lithium iron phosphate (LFP) batteries do not contain nickel or cobalt, distancing them from the environmental and social problems often linked to critical minerals mining.
“From a sustainability point of view, this is as good as it gets,” Bacher said last May.
He did not immediately respond to a request for comment on the company’s decision to file for bankruptcy proceedings.

It aimed to sell these batteries for energy storage, increasingly important as variable solar and wind power comes to dominate European grids, and for off-road and commercial vehicles. Those sectors, rather than electric cars and motorbikes, were being targeted because they were subject to less ferocious competition from Asia, Bacher said.
Industry experts say Morrow started smaller and slower than Northvolt, was selective about its target customers and secured deals with Finnish environmental technology company Proventia Oy and an unnamed German defence company.
But it still ran into financial trouble.
Cash crunch proves costly
In a statement announcing the bankruptcy, Morrow’s board said it had been trying to secure a new industrial investor and finance, and that “several of the ongoing efforts had reached an advanced stage”.
But these talks “could not be concluded within the constraints imposed by the group’s liquidity situation”, it said, blaming the failure on “the capital requirements inherent in an early industrialisation phase” combined with “increased capital costs, delays in the industrialisation process and a more restrained investment market”.
Northvolt’s bankruptcy may have also damaged Morrow’s attempts to raise money. Last May, Bacher himself acknowledged that it “didn’t help”.
Morrow also cited oversupply in the global battery market, and the resulting downward “price pressure”. The price of LFP batteries fell by nearly half between 2022 and 2025, eating into producers’ profit margins, according to the International Energy Agency.

The hefty state investment in Morrow has generated controversy in Norway following its bankruptcy. The leader of the right-wing Progress Party (FrP), Sylvi Listhaug, has said Norwegian taxpayers’ money was wasted on an unviable business.
But others, like Poliscanova and the head of the European Battery Alliance trade association Emma Nehrenheim, told Climate Home News that if Europe wants a battery industry, it will need to back home-grown manufacturers whole-heartedly.
“Valley of death” kills startups
As European battery manufacturers work to perfect and scale up their technology and processes, they face “a valley of death” with severe competition and little patience from investors or battery customers who “can easily buy them from China”, Poliscanova said.
Startups like Morrow typically raise project financing to get them off the ground, according to Nehrenheim. In the period between that finance ending and reaching profitability, they have to rely on money they set aside as a project reserve.
If they underestimate this reserve, which she said is easy to do when setting up a new factory making a new product, they need more money to bridge the gap. This can come from specialised bridging investors, from customers or from governments.
For Morrow, however, the money did not arrive in time.
Nehrenheim – who was previously Northvolt’s chief environmental officer – said it was a characteristically European failure from investors.
“We’re not good at this,” she said. “We’re not bold enough to compete with Silicon Valley or the Asian (countries), who have been scaling industry now for decades.”
Clean energy sovereignty vs price
Since Northvolt’s bankruptcy filing, the European Union has announced policies to support European battery makers.
It is introducing a €1.5 billion ($1.7 billion) “battery booster“, providing interest-free loans to battery manufacturers. It is considering putting tariffs on imported batteries, subsidising European battery makers and tying electric car incentives to locally made batteries through the Industrial Accelerator Act. None of these policies are yet in place.
With trade disputes rising up the agenda of UN climate talks, Poliscanova conceded that such moves are protectionist, although she said she prefers to call them industrial policy.
“Honestly,” she said, “the EU and the UK are the two large global blocks left that don’t have such industrial protectionist policies. India has it, Brazil has it, China has it, the US has it – we’re literally the last fool standing thinking that [the World Trade Organization] is the way to go.”
Li Shuo, China Climate Hub director at the Asia Society Policy Institute, said that the trade-offs between cheap foreign batteries and more expensive European ones “need to be discussed honestly”.
“How much higher are Europeans willing to pay?” he said. “How much delay in climate deployment is acceptable? Can we really decarbonise and de-risk at the same time? How long can politicians condemn cheap Chinese imports while consumers simultaneously demand affordability?”
While European policymakers want to fight China, the average European just wants a cheap battery, he added.
Closing the cost gap
But once European battery makers scale up, the price gap with Chinese batteries will shrink, Poliscanova said.
While German LFP battery cells are 90% more expensive than those made in China, scale-up could close this gap to a “sovereignty premium” of just 25% by 2030, Transport & Environment estimates.
Nehrenheim acknowledged that most of Europe’s batteries will continue to come from Asia or the United States. “I’m very happy for that because they’re scaling fast and they get great support subsidies in their respective countries to supply us to help us in the [energy] transition,” she said.
But European-headquartered companies must make at least a quarter of the region’s batteries, she said, otherwise if supply is disrupted – whether by geopolitical factors, a pandemic or natural disaster – the industry will have nothing to scale up from.
Nehrenheim said she was almost 100% confident that Morrow’s factory will continue to produce batteries. The company said it expected a court-appointed bankruptcy administrator to assume control over the company’s assets and operations.
Citing investors’ €1.4 billion ($1.62 billion) reprieve of Swedish green steelmaker Stegra in April, Nehrenheim said there were reasons to be hopeful about Morrow’s survival as Europe demands batteries for diverse uses beyond cars – from energy storage to drones and forklift trucks.
“Somebody will pick this up,” she said.
The post After another battery startup bankruptcy, can Europe ever cut reliance on China? appeared first on Climate Home News.
After another battery startup bankruptcy, can Europe ever cut reliance on China?
Climate Change
‘Energy Vampires’: Greenpeace calls for moratorium on data centres as new report reveals frenzied rollout would derail energy transition
SYDNEY, Wednesday 27 May 2026 — A new report from Greenpeace Australia Pacific and independent expert Ketan Joshi reveals how the frenzied rollout of AI data centres in Australia is set to derail the renewable energy transition, entrench gas and turbocharge climate pollution, prompting calls for an urgent moratorium on data centre approvals until appropriate guardrails are in place.
The report, Energy Vampires: the AI data centres draining Australia, reveals the staggering scale of data centre growth in Australia, set to follow a US path of emissions blowout and rising community opposition to the resource-hungry facilities. The report exposes the links between the data centre lobby and the gas industry, who are using data centre growth to justify extracting more gas.
Greenpeace Australia Pacific is calling on the Federal Government to urgently implement a moratorium on the construction and approval of new data centres, until appropriate regulations and safeguards have been put in place to protect the climate and communities.
Key findings:
- Data centres are already failing to cover their own demand with additional renewable energy, and resisting calls to mandate that they do.
- At its peak, Australia’s biggest proposed data centre, the 1GW Mamre Road Data Centre Campus in Western Sydney, will generate annual emissions equivalent to 560,000 petrol cars, or all domestic flights within NSW in 2023.
- There are early signs of a data centre-fuelled gas boom in Australia, including proposals for new on-site gas, as seen in the US.
- Cloud Carrier’s proposed gas-fired data centre in NSW would wipe out the state’s entire projected 2028 emissions cuts.
- Even if only 1 in 4 new Australian data centres were powered by new on-site gas, it would result in 2.8x higher total emissions compared to using grid power.
Joe Rafalowicz, Head of Climate and Energy at Greenpeace Australia Pacific, said: “Australia is completely unprepared for the magnitude of impacts of the AI-driven data centre frenzy. Data centres are being rolled out at a feverish pace, with some of the largest planned for Australia consuming as much energy as Adelaide. The recent federal and state energy minister communique is a positive first step towards regulating the data centre industry, and managing its impact on the energy transition and the communities where they’re being built.
“But we should all be concerned by the extreme lack of scrutiny being applied to the companies leading the data centre charge in Australia and their proposals. Without strong, legislated standards, we risk replicating the disastrous US pattern, where Big Tech corporations have carte blanche to drain energy and water, and build new, polluting gas and diesel-powered plants to fuel their operations. This has seen mounting community opposition that transcends party politics, something we’re beginning to see here in Australia.
“Greenpeace is calling for a moratorium on new data centre approvals and construction until we have clearly defined, enforceable regulations and standards in place to govern this industry — essential if we hope to avoid the alarming outcomes outlined in this report.
“Australia is not a playground for Big Tech corporations. It is time our leaders stepped up and took seriously their role as custodians of our resources and protectors of our society and environment.”
Ketan Joshi, independent report author and climate expert said: “Impatience is not a virtue. The reckless data centre buildout is heaping massive new load onto the grid, meaning renewables have to run harder just to stay in the same spot. Currently data centres increase coal and gas output and delay shutdowns, while plugging polluting gas into data centres does the damage directly instead.
“Unless the data centre industry builds no new fossil fuels and far more new renewables than new demand, we end up worse off. Australia’s gas industry sees a lifeline in an unchecked data centre frenzy, and the feeling seems to be mutual.
“Data centre demand projections keep jabbing upwards each revision, and emissions projections keep getting worse. Everywhere in the world facing this frenzy sees the same trend.
“Data centre moratoria have bipartisan support in countries around the world as the only path to reintroducing careful, considered governance of data centre growth. In the context of an irrational, unjustified panic, a temporary pause brings reason and rationality, along with bringing power to communities.”
-ENDS-
Images and an interview clipreel of Greenpeace spokespeople at the Mamre Road data centre in Western Sydney available here.
Media contacts:
Lucy Keller on 0491 135 308 or lucy.keller@greenpeace.org
Kate O’Callaghan on 0406 231 892 or kate.ocallaghan@greenpeace.org
Climate Change
Energy Vampires: the AI data centres draining Australia
A new report from Greenpeace Australia Pacific and independent expert Ketan Joshi reveals how the frenzied rollout of AI data centres in Australia is set to derail the renewable energy transition, entrench gas and turbocharge climate pollution, prompting calls for an urgent moratorium on data centre approvals until appropriate guardrails are in place.
The frenzied rollout of AI data centres in Australia is rushing through massive new projects, which will derail Australia’s energy transition unless the government urgently intervenes.

Key findings
- The frenzied rollout of AI data centres in Australia is rushing through massive new projects, which will derail Australia’s energy transition unless the government urgently intervenes. Our conservative assumptions mean this impact is understated, in this analysis.
- Australia’s biggest proposed data centre, the 1GW Mamre Road Data Centre Campus in Western Sydney, will generate peak annual grid emissions equivalent to that produced by 560,000 petrol cars for a year or all domestic flights within NSW in 2023.

- Data centres already fail to cover their own emissions with new renewables and their rollout will dramatically hold back Australia’s energy transition.
- No data centre operator analysed in this report adequately proves their claim of driving Australia’s renewable energy growth. Claims they are doing this through truly “additional” new power purchasing agreements for renewable energy are unsubstantiated.
- There are early signs of a data centre-fuelled gas boom in Australia, which will come with massive, nationally significant climate costs. For example, the Tamboran proposal for the Northern Territory would effectively double the state’s emissions. In NSW, Cloud Carrier’s proposed gas-fired project would wipe out NSW’s entire projected 2028 emissions cuts.
- Even if only 1 in 4 new Australian data centres were powered by new on-site gas, it would result in 2.8x higher total emissions compared to using grid power.
- New analysis shows that on-site gas for data centres globally could fuel emissions that exceed Brazil’s total power grid emissions by 2030.
- Fossil fuel corporations are quietly joining the data centre lobby group as members, and sponsoring and attending technology industry conferences. The two industries are reinforcing each other’s talking points and PR spin.

- Data centre operators do not disclose the customers of an individual facility, the purpose of the computations performed there, or site-specific energy consumption, despite the industry’s defense of its ‘critical infrastructure’ status or claims of transparency. It is a matter of public record that AI is being used for abuse, war and other human rights violations.
- Data centres can be ‘right sized’ through community ownership schemes, well-deployed AI software and strict moratoria to allow for democratic governance of this industry.

This report recommends:
- An urgent moratorium on data centre development until safeguards are legislated
- Binding, legislated standards for AI development, including substantiated claims of additional renewable energy
- Full disclosure of services delivered, emissions, finances and energy use, per project
- Full assessment of compliance with human rights frameworks
Lead author: Ketan Joshi is an independent climate, environment and sustainability expert. He was the lead author on “The AI Climate Hoax”, published with several corporate accountability and environmental groups in 2026, and previously wrote “Windfall: Unlocking a Fossil Free Future” with the University of New South Wales Press. He worked for eight years in Australia’s renewable energy sector (corporate and government), and has worked with European NGOs working on climate communications and corporate accountability.
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