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Welcome to Carbon Brief’s DeBriefed.
An essential guide to the week’s key developments relating to climate change.

This week

Net-zero media storm

NET-ZERO ATTACKED: The UK’s Labour government had to defend its net-zero policies after comments by former prime minister Tony Blair in a thinktank report sparked a frenzied media storm. Former Labour leader Blair said the world’s current approach to tackling climate change is “failing”, the Independent reported. (More accurately, Blair stated that “phasing out fossil fuels in the short term…is doomed to fail”, rather than at all, as highlighted in a factcheck by Carbon Brief’s Simon Evans on social media.)

MEDIA FRENZY: Blair’s comments were featured prominently – and inaccurately – by the UK’s climate-sceptic right-leaning media. In frontpage coverage, the Daily Telegraph described Blair’s comments as a direct “attack” on prime minister Keir Starmer, despite acknowledging in its coverage that Blair did not mention the UK. A frontpage Times story called Blair’s intervention the “latest sign that the mainstream consensus on green policies is collapsing”. (Carbon Brief has just published an analysis showing the same media have published 65 editorials attacking energy secretary Ed Miliband in the first four months of 2025.)

‘CLUMSY’ CRITICISM: BBC News reported that Starmer has since defended his net-zero policies in parliament. According to the Guardian, Downing Street “forced” Blair to “row back from his criticism”, after “furious Labour politicians warned he had given a boost to Tory and Reform on the eve of the local elections”. A former employee of Blair called his intervention “clumsy” and his ideas “expensive” and “unpopular” in Prospect magazine.

Around the world

  • CANADA FOR CARNEY: Mark Carney’s Liberal party won this week’s Canadian elections, Climate Home News reported. The outlet said that Canadians chose the  “former central banker and UN climate envoy” over the “anti-climate action Conservative party of Pierre Poilievre”.
  • 100 DAYS: As the Guardian and other outlets covered Donald Trump’s first 100 days in office, the New York Times reported that his administration had dismissed hundreds of experts working on the country’s National Climate Assessment report.
  • UPHILL BATTLE: The COP30 president has “admitted” that this year’s talks will be a “slightly uphill battle” due to economic turmoil and Trump’s removal of the US from the Paris Agreement, the Guardian reported. 
  • AIRLINE EMISSIONS: European airline emissions are on course to exceed pre-pandemic levels this year, according to the Financial Times.
  • NEW NORMAL: Much of India and Pakistan is “sweltering” under early heatwaves, the Guardian reported. The newspaper highlighted that a Pakistani city in Sindh province recorded temperatures of 50C – nearly 8.5C above the April average.

38%

The percentage of global losses from “natural catastrophes” that were insured in 2023, according to a report by Zurich Insurance Group. The analysis found total losses of $280bn.


Latest climate research

  • A combination of climate change and failure to meet sustainable development goals could contribute to an increase in global antimicrobial resistance by 2050, according to a study published in Nature Medicine.
  • A paper published in Science Advances found that “co-exposure” to extreme heat and wildfire smoke has increased across 11 states in the western US over 2006-20.
  • Just 2% of the UK Climate Change Committee’s (CCC’s) recommendations to the UK government over 2009-20 were accepted in full, according to new research published in Climate Policy

(For more, see Carbon Brief’s in-depth daily summaries of the top climate news stories on Monday, Tuesday, Wednesday, Thursday and Friday.)

Captured

Electricity generation capacity in Spain, megawatts (MW), from 27-29 April, showing the drop in generation.

On Monday, a blackout across most of Spain and Portugal plunged the countries into chaos. While the initial trigger remains uncertain, the nationwide blackouts took place after around 15 gigawatts (GW) of electricity generating capacity – equivalent to 60% of Spain’s power demand at the time – dropped off the system within the space of five seconds (as illustrated above). At the time, solar accounted for 59% of the country’s electricity supplies, wind nearly 12%, nuclear 11% and gas around 5%. As the crisis was still unfolding, many media outlets were quick to blame renewables, net-zero or the energy transition for the blackout, despite very little available data or information. Carbon Brief has examined what is currently known about the power cuts and how the media has responded.

Spotlight

Trump’s ‘cascading’ impact on European climate science

This week, scientists attending the European Geosciences Union meeting in Vienna tell Carbon Brief how cuts to science funding and the dismantling of climate agencies in the US is impacting their work.

Dr Shouro Dasgupta, environmental economist at Fondazione CMCC in Italy:

“Trump’s decision to cut funding on climate science in the US will likely have cascading effects on both European research and global climate resilience. The transatlantic partnership is built on shared values and decades of cooperation. It has been crucial for advancing global understanding of climate change through joint efforts in Earth observation, including data infrastructure and joint policy innovation.

For example, several European Centre for Medium-Range Weather Forecasts products that rely on National Oceanic and Atmospheric Administration (NOAA) data streams will now face gaps in input data.

A major loss has been the defunding of Famine Early Warning Systems Network – a critical system that operated in more than 30 famine-prone countries and was the only consistent source of regular famine and food insecurity early warning.

Trump’s actions will slow our ability to understand and respond effectively to the climate crisis, a loss that, ultimately, impacts everyone.”

Dr Carl Schleussner, climate scientist at the International Institute for Applied Systems Analysis in Austria:

“I’m concerned about the credibility of science and communication. Attacks on science and scientific integrity are being driven by social media and alternative media platforms – and artificial intelligence (AI) systems can generate something that looks like a scientific paper, [but] is complete rubbish. [AI] basically drives down the cost of fakes to zero. We are running a heightened risk of climate misinformation.

Trump’s special advisor [Elon Musk] owns one of the largest social media networks and Grok [an AI system] can produce something like a paper in no time. Trying to undermine [science] by flooding the zone with sh*t is a declared strategy – and it is the total antithesis to science.

It is one thing to rebut people that are paid to ask stupid questions about the validity of climate science, as we’ve done for decades. [But it is another] to fight an AI system that produces all this bullsh*t in no time. As a scientific community, we are not equipped to fight back…I hope other actors in society are thinking about how to support climate science and the integrity of science and its role in society.”

Dr Eva Pfannerstill, atmospheric chemist at Forschungszentrum Jülich in Germany:

“The NOAA cuts are definitely impacting the air-quality research community and rippling to Europe. For several months this year, our NOAA colleagues were not allowed to join online meetings with us anymore, stalling the fruitful discussions and collaborations we have had for many years. One NOAA colleague was supposed to give an invited talk at EGU, but he was not allowed to travel.

Thinking back to last year’s EGU where we hung out with many NOAA colleagues, it was such a short time ago – but seems almost like another era where trans-Atlantic scientific cooperation and US leadership in atmospheric research were a given. Now our US colleagues are scared – scared to put anything in writing that could be used against them, scared of losing their funding and/or jobs.”

Prof Sonia I Seneviratne, climate scientist at the Institut für Atmosphäre und Klima at ETH Zurich in Switzerland and Intergovernmental Panel Climate Change Working Group 1 vice chair:

“The current attacks on climate research in the US are extremely concerning. A full generation of young researchers have been fired from their positions and are unlikely to stay in climate research. While some might move to Europe or other continents, it is not in the interest of the global climate research community to see such a weakening and even a destruction of climate research in the US.

While some decisions against climate research institutions and researchers might be annulled by the courts, several might be near impossible to reverse. For instance, buildings [that] will no longer be available for research institutions and researchers [that] move on to other positions out of concerns for their job security.

Attacks on climate science won’t change the facts and the reality of climate change – but they weaken our possibilities to address the climate crisis.”

Watch, read, listen

POWER PLAYER: For Common Dreams, Bill McKibben claimed that Mark Carney knows “roughly 20 times” as much about climate and energy economics than any other leader.

CONNECTED CRISES: In a new book, Climate Injustice, climate scientist Dr Friederike Otto argued that global justice is at the core of the solution to climate change.

SONG AND SEED: Al Jazeera ran a long-read about efforts led by Brazil’s Indigenous Maxakali community to protect and restore the rainforest in Minas Gerais.

Coming up

Pick of the jobs

DeBriefed is edited by Daisy Dunne. Please send any tips or feedback to debriefed@carbonbrief.org.

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The post DeBriefed 2 May 2025: Iberian blackout; Tony Blair’s ‘clumsy’ comments; Trump’s ‘cascading’ impact on European climate science appeared first on Carbon Brief.

DeBriefed 2 May 2025: Iberian blackout; Tony Blair’s ‘clumsy’ comments; Trump’s ‘cascading’ impact on European climate science

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Analysis: Weaker EV targets could cost UK consumers £3bn a year by 2030

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An upcoming UK government consultation on weakening targets for electric vehicles (EVs) could cost consumers as much as £3bn a year by 2030, according to Carbon Brief analysis.

It could require the UK to import an extra 17m barrels of oil in 2030, raising expected net imports by 8%, as well as adding 2.5% to national emissions that year, the analysis shows.

After years of fierce lobbying by parts of the car industry – and despite the significant savings on offer for EV drivers – media reports suggest that EV targets could be “watered down”.

Under current rules, battery EVs – BEVs, those which run only on electricity – must make up a rising share of new car sales in the UK.

This policy, known as the “zero-emission vehicles” (ZEV) mandate, was introduced by the previous Conservative government and sets a goal for 33% BEV sales in 2026, rising to 80% in 2030.

(Carmakers are able to use “flexibilities” to help meet their targets, which reduces the effective target under the ZEV mandate to an estimated 25% of sales in 2026.)

Now, the government under new Labour prime minister Andy Burnham is reported to be considering a cut in the BEV target for 2030 to just 50% of new car sales, alongside options for 60% or 70%.

Carbon Brief understands that a consultation on weakening the ZEV mandate is being reviewed by the prime minister’s office in Number 10, ahead of being formally released.

If the mandate is weakened to 50% by 2030 – and if carmakers make more use of “flexibilities” – there could be up to 3m fewer BEVs on UK roads by 2030, according to the NGO T&E.

Previous Carbon Brief analysis found that BEVs are around £1,100 cheaper to run per year than a petrol car, thanks to far lower fuel costs.

Overall, BEVs are more than £1,000 per year cheaper to own than either petrol cars or plug-in hybrids (PHEVs, which can run on petrol or electricity).

This is according to analysis of the “total cost of ownership” by the Energy and Climate Intelligence Unit (ECIU), including purchase price, fuel costs, insurance and proposed pay-per-mile charges.

In total, Carbon Brief analysis shows that UK drivers could be hit with an extra £3bn in annual ownership costs by 2030, if the ZEV mandate is weakened, as shown below.

Bar chart showing that weaker EV targets could cost UK consumers £3bn a year by 2030

A weaker ZEV mandate could “put billions of pounds of committed investments at risk”, reports BusinessGreen, including in the EV charging network and battery supply chains.

Industry group Energy UK says that the mandate is “working in the way it was designed to work” and that it is the “single biggest driver of emissions reductions” in government climate plans.

However, Carbon Brief analysis shows that a weaker ZEV mandate could result in an extra 7.4m tonnes of carbon dioxide emissions (MtCO2) in 2030. This would add the equivalent of 2.5% to national emissions in 2030, under the UK’s international climate goal for that year.

In addition, a weaker ZEV mandate could result in the UK needing to import an extra 17m barrels of oil in 2030, equivalent to 8% of projected net imports that year.

Energy UK says that shifting to EVs will help to reduce household energy bills “for everyone”. This is not only through direct cost-of-ownership savings for EV drivers, but also by spreading the costs of upgrading the electricity system across a wider user base.

Car industry group the Society of Motor Manufacturers and Traders claims that its members are spending “blilions…on discounts, finance incentives and marketing support” and that “natural” EV demand is below the level required to meet the current ZEV mandate. Its claims are disputed.

The post Analysis: Weaker EV targets could cost UK consumers £3bn a year by 2030 appeared first on Carbon Brief.

Analysis: Weaker EV targets could cost UK consumers £3bn a year by 2030

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“We’ve gone backwards” – new plastics treaty text dims hopes for production curbs

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A new draft text to revive deadlocked UN plastics treaty talks does not include specific measures on managing runaway plastic production, a growing source of greenhouse gas emissions, drawing criticism from some countries and campaigners that ambition for the global pact is shrinking.

After diplomats met in Nairobi early in July for the first time since negotiations fell apart a year ago, Chilean ambassador Julio Cordano, who is chairing the talks, released a first document last weekend, setting out elements of a possible treaty to tackle plastic pollution.

Cordano stressed this is an “informal reference document” rather than a negotiated text. But its structure is similar to a draft treaty and closely resembles the previous version rejected by governments during the last round of formal negotiations in Geneva.

The new text recognises the world’s “unsustainable” levels of plastic production and consumption, both of which are projected to nearly triple by 2060. But it contains no measures to stem that growth, critics say, pointing to what they see as a broader weakening of ambition.

They argue the document is increasingly aligned with the demands of fossil fuel-producing countries, including Gulf states, the US and Russia, which have pushed for the treaty to focus on managing plastic waste rather than limiting production.

“When you leave the countries that have the most vested interests in delaying meaningful action to shape the agenda, you end up with a text that does nothing to end plastic pollution,” said David Azoulay, environmental health programme director at the Center for International Environmental Law (CIEL).

France disappointed with production omission

“We’ve gone backwards rather than forwards,” Christina Dixon, a campaigner at the Environmental Investigation Agency (EIA), told Climate Home News. “A text that was rejected by the majority of countries in Geneva as being too weak and not ambitious enough has been repackaged one year later with some key elements removed and put out as a kind of sign of progress.”

A French diplomatic source told Climate Home News it was “disappointing” that the text lacked any concrete provisions on tackling “unsustainable” levels of plastics production and consumption. That is despite a majority of countries repeatedly advocating for curbs and scientists saying the world cannot put an end to plastic pollution without tackling the issue at source, they added.

    Governments across Europe, Latin America, Africa and the Pacific islands have previously called for efforts to limit the manufacturing of plastics to “sustainable levels”, but their efforts have been frustrated by strong and persistent opposition from a small group of fossil fuel producers, who see plastics as a growing market for oil and gas.

    Weakening of production ambition

    Cordano told Climate Home News that the “concept” of sustainable production is still reflected in different parts of the new document.

    But measures aimed at achieving that objective have progressively weakened over time. Initial versions of the draft treaty, dating back to 2024, included a standalone article with the option of setting a global target to reduce the production and consumption of primary plastics.

    That disappeared from successive drafts published in Geneva last year. The last version nevertheless said data on plastic production could be considered in future assessments of whether the treaty was meeting its objectives. Observers saw this as an important provision that could have strengthened the pact over time and potentially kept the door open for a global production target.

    The new text only mentions “sustainable production” in the preamble and includes an article saying that countries could improve the design of plastic products in order to contribute to “sustainable production”.

    “There’s a war of attrition element,” said Dennis Clare, a negotiator for the Pacific island nation of Micronesia. “The countries that want to do less are dragging out discussions and gradually pressuring the more ambitious to compromise towards a lower common denominator.”

    Little space for thorny discussions

    Countries have twice failed to agree on a global plastics treaty at what were meant to be final rounds of negotiations in December 2024 and August 2025. After being selected as the new chair earlier this year, Cordano has been working to steer the process back on track through a series of informal meetings, hoping diplomats can find common ground ahead of the next formal negotiations scheduled for early 2027.

    But he has been criticised for sidelining discussions on some of the thorniest issues. Cordano kept plastic production off the official agenda for the Nairobi meeting a few weeks ago. He said beforehand that countries could bring any issue to the table, but production did not feature in the summary of discussions subsequently published by the chair.

    Clare said discussions on fundamental elements of the treaty, including production, had been “constrained” and that there was little space for them in Nairobi.

    Cordano told Climate Home News the Nairobi talks had provided space both for “reaffirming positions and expressing new ideas”, adding that countries “remain free to raise all issues they consider important”.

    Informal talks between negotiators are held behind closed doors and neither the media nor external observers can take part.

    Workers sort plastic waste at a recycling workshop on November 17, 2025 at Xa Cau village, outside Hanoi, Vietnam. (Photo by Thanh Hue/Getty Images)

    Workers sort plastic waste at a recycling workshop on November 17, 2025 at Xa Cau village, outside Hanoi, Vietnam. (Photo by Thanh Hue/Getty Images)

    Campaigners have accused the chair of making political calculations to reach an agreement at any cost. “He has clearly identified that the only way to achieve an agreement by consensus is to do away with the more complex elements of the treaty like those that deal with sustainable production and consumption of plastics,” the EIA’s Dixon said.

    Cordano said he continues to be guided by countries as “they develop their own exchanges and continue working towards possible landing zones”.

    Push for more ambition

    Governments will debate the new text at another meeting of chief negotiators in Bangkok, Thailand, at the end of September, and a new version of the document is expected after that meeting.

    The French diplomatic source said the current text should not be viewed as “an end-product”, but as a starting point that “can and should be improved”.

    France, together with the EU and members of the High Ambition Coalition (HAC), will continue pushing for stronger provisions, including measures to address plastic production, the source said.

    China’s coal power rebounds as record clean energy goes to waste

    The HAC group includes over 70 countries, primarily from across Europe, Latin America, Africa and the Pacific.

    Micronesian negotiator Clare said countries on the frontline of the plastics crisis may decide to reject a really weak treaty that puts the burden on them to clean up somebody else’s waste, while producers can keep churning out plastics unrestrained.

    “If the treaty does not include essential elements of the solution, even an initial, apparent diplomatic success – an agreement – can come to be seen over time as an environmental failure,” Clare warned.

    The post “We’ve gone backwards” – new plastics treaty text dims hopes for production curbs appeared first on Climate Home News.

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    South Africa’s offshore oil push meets grassroots resistance in court

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    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.

      A demonstration against TotalEnergies' offshore oil exploration effort in South Africa.
      A demonstration against TotalEnergies’ offshore oil exploration effort in South Africa. (Photo: Ashraf Hendricks/GroundUp News)

      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.

      Co-plaintiff in the case against Shell Sinegugu Zukulu.
      Sinegugu Zukulu, co-plaintiff in the case against Shell. (Photo: Tom van der Schijff)

      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.

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