Welcome to Carbon Brief’s DeBriefed.
An essential guide to the week’s key developments relating to climate change.
This week
Deadly extremes
FLOODING: Up to 700 people are believed to have been killed by flash floods in Nigeria, reported BBC News. Northern Nigeria has faced “prolonged dry spells worsened by climate change”, followed by “excessive rainfall”, which can cause flash flooding, reported the Associated Press.
FIRES: In Canada, continuing wildfires forced the evacuation of more than 26,000 people, “with heavy smoke choking millions of Canadians and Americans and reaching as far away as Europe”, reported Le Monde. CBC News reported that authorities in the Canadian state of Saskatchewan have been “battling the worst wildfire [the state has] seen in decades”. Scientist Prof Colin Laroque told the broadcaster: “This is classic climate change…This is our new normal.”
DEVASTATION: In northeastern India, at least 48 people have been killed in flash floods, Al Jazeera reported. Meanwhile, in China’s southwestern Yunnan province, heavy rainfall over the weekend triggered “flash floods and mudslides”, damaging roads and disrupting power supplies to around 5,000 people, reported Reuters.
Trumping at the bit
DRILL, BABY, DRILL: The Trump administration in the US announced plans to eliminate Biden-era protections across millions of acres of the Alaskan Arctic, opening the area up for drilling and mining “in some of the last remaining pristine wilderness in the country”, the New York Times reported. According to US energy secretary, Chris Wright, Trump wants to “double the amount of oil coursing through Alaska’s vast pipeline system” and build a “massive natural gas project as its ‘big beautiful twin’”, reported the Associated Press.
‘GOLD STANDARD’: Elsewhere, more than 6,000 scientists and academics signed an open letter opposing a new push by Trump to impose what he called a restoration of “gold standard science” across federal agencies and national laboratories, reported the the New York Times. It explained: “The executive order puts his political appointees in charge of vetting scientific research and gives them the authority to ‘correct scientific information’, control the way it is communicated to the public and the power to ‘discipline’ anyone who violates the way the administration views science.” Meanwhile, CNN reported that “NASA scientists describe ‘absolute sh*tshow’ at agency as Trump budget seeks to dismantle top US climate lab”.
Around the world
- BIG TECH: Meta signed a 20-year deal with an Illinois nuclear plant for energy to power its AI and data centres, reported the Financial Times.
- BIG SOLAR: Builders will be required to fit solar panels to the “vast majority” of new-build homes in England under changes to be published this year, according to energy secretary Ed Miliband, said BBC News.
- BIG TARGET: The EU’s climate science adviser warned the bloc against watering down climate targets, a day after it was reported that EU climate commissioner Wopke Hoekstra “successfully lobbied Germany’s coalition government to endorse a controversial measure that weakens the EU’s next climate target”, said Politico.
- BIG PROBELÉM: Civil society groups raised the alarm on how the “exorbitant price of accommodation” and “high cost of flights” will undermine Brazil’s civil society participation at COP30 in Belém, reported Dialogue Earth.
$2.2 trillion
How much global investment in clean-energy technologies, including renewables, nuclear and energy storage, is expected in 2025, according to the International Energy Agency. This is “twice the amount expected for fossil fuels”, reported Reuters.
Latest climate research
- A study in Communications Earth & Environment warned that the world has “likely” already reached a tipping point in the West Antarctic ice sheet and that its collapse would result in four metres of sea level rise over a timescale that “could be millennia”.
- Nature Communications published research which found that poor air quality in Europe could lead to 282,000 premature deaths a year by 2100 under a low-ambition climate scenario – but drop to 67,000 if ambitious action is taken to cut emissions.
- Climate change-driven atmospheric evaporative demand – sometimes known as “atmospheric thirst” – caused around 40% of increased drought severity globally from 1981-2022, according to new research in Nature.
(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 UK’s sunniest spring generated a record amount of solar power, according to new Carbon Brief analysis. The data revealed that the nation’s solar sites generated a record 7.6 terawatt hours (TWh) of electricity from January to May 2025. This is 42% higher than the 5.4TWh generated in the same period last year, as well as marking a much larger 160% increase over the past decade, the analysis said. It added: “The solar electricity generated in 2025 to date has avoided the need to import gas costing around £600m, which would have released 6m tonnes of carbon dioxide (MtCO2) when burned.” The Times and BBC News covered the analysis.
Spotlight
Lessons from 20 years of Japanese ‘Cool Biz’
This week, Carbon Brief examines a “casual dress” policy that has been “surprisingly effective” at driving emissions savings in Japan.
For many people, the thought of Japan conjures up images of thronging cities, bright lights and smartly dressed “salary-men” unwinding in an “izakaya” (Japanese pub) after a gruelling day at the office.
Every morning, in cities around Japan, some 38 million office workers put on a uniform of suits and ties and make their way to work.
Come summer, however, and the morning commute adopts a laid-back Friday feel. Men’s suit jackets and neckties are replaced by open collars and short sleeves. Venture to the southern island of Okinawa and you might spot a salary-man in a Hawaiian-style “kariyushi” shirt.
This was not always the case. Twenty years ago this month, then-environment minister Yuriko Koike introduced Japan – and the world – to the term “Cool Biz”.
“Cool Biz” – literally Cool Business – is an enduring campaign aimed at reducing energy consumption from air conditioning in the hot summer months when temperatures routinely exceed 30C.
‘No necktie’
Introduced in 2005, the same year the Kyoto protocol finally “entered into force”, Cool Biz mandated that government office buildings turn down the air conditioning to 28C and encourage employees to cool off by wearing less formal clothing. The campaign was characterised by the pithy slogan: “No jacket, no necktie.”
The impact was near immediate. By official estimates, nearly half a million tonnes of CO2 were saved in the first year of Cool Biz. The following year the savings tripled.
In 2012, the policy was estimated to have saved Japan 2.2 MtCO2 of emissions. (This is equivalent to the emissions of Montenegro that year.)

While temperature regulations were only mandated in government buildings, the impacts of the campaign extended far wider.
Thanks to a widespread publicity campaign – which included a Cool Biz fashion show of Japanese public figures and business leaders – name recognition reached 96% in its first year, according to a survey by the Ministry of Environment.
Uniqlo, Japan’s largest clothes retailer, recorded a 14% sales bump – which it attributed to its range of Cool Biz-appropriate casual workwear. And the Federation of Japanese Necktie Unions petitioned the government, after it forecast a 30% sales slump worth approximately £1bn.
‘Accidental steering’
Twenty years on, working in relaxed attire in summer has become “firmly established in Japanese society”, Atsushi Watabe, programme director of sustainable consumption and production at Japan’s Institute for Global Environmental Strategies, told Carbon Brief.
But research into its popularity revealed that concerns about climate change are unlikely to have played a major role in the uptake.
Surveys with members of the public found that Cool Biz had little or no impact on peoples’ reported environmental awareness or commitment, according to Prof Elizabeth Shove, an emeritus professor of sociology at Lancaster University,
Cool Biz’s actual success was a case of “accidental steering” through a combination of social, material and historical factors, said Shove.
Government officials led by example, she said. Japan’s then prime minister Junchiro Koizumi insisted that Cool Biz be worn for cabinet meetings and appeared in interviews in open-collar shirts.
“If the ministers are wearing a tie, their subordinates would feel uneasy about not wearing it,” prime minister Koizumi said at the time. “So the ministers should not wear a tie.”
Turning down the air conditioning in government buildings, likewise, set a standard for other businesses to follow.
Timing also played a role, according to Watabe. Women working in Japanese offices were some of the earliest to support Cool Biz, having been subjected to cooling conventions adapted for male workers, he said, adding:
“Gradually, men who had always considered wearing suits outside as the norm also accepted the change and began to feel its benefits.”
A key lesson is that the success of Cool Biz came from shifting societal norms rather than targeting the behaviour of individuals, said Shove:
“Norms and values don’t just exist – they come from histories of standards, regulations and building research… [Cool Biz] was surprisingly effective by not changing individual behavior, but by just setting a new standard in the government’s own buildings and in industry.”
Watch, read, listen
DRILLED: A new podcast series explored how ”Greenpeace, which was only tangentially involved in the Standing Rock [oil pipeline] protests, has been slapped with a $666m bill for damages”.
REPUBLICANS ‘SCARED’: The Guardian interviewed former Democratic presidential candidate Bernie Sanders on a wide range of issues, including his thoughts on why some Republicans are “scared” to speak about the reality of climate change.
SELLING NEGATIVE EMISSIONS: A feature in the Financial Times examined the “battle to create a carbon trading market for negative emissions” in the UK.
Coming up
- 7 June: Ocean Rise and Coastal Resilience Summit, Nice, France
- 7-8 June: Blue Economy and Finance Forum, Monaco
- 9-13 June: Third UN Ocean Conference, Nice, France
- 11-13 June: Global NDC Conference 2025, Berlin, Germany
Pick of the jobs
- Asia Society Policy Institute, senior programme officer, China climate industrial policy | Salary: $58,500-70,000). Location: Washington DC
- Greenpeace, senior communications advisor | Salary: AUD$116,562.56. Location: Australia
- The Hertie School, research associate or postdoctoral researcher – climate politics | Salary: Unknown. Location: Berlin, Germany
DeBriefed is edited by Daisy Dunne. Please send any tips or feedback to debriefed@carbonbrief.org.
This is an online version of Carbon Brief’s weekly DeBriefed email newsletter. Subscribe for free here.
The post DeBriefed 6 June 2025: Nigeria’s deadly flash floods; UK’s record spring drives solar surge; Lessons from Japan’s ‘Cool Biz’ appeared first on Carbon Brief.
Climate Change
UN chief urges countries to adopt fossil fuel transition plans with timelines
The head of the United Nations has called on all countries to deliver plans for phasing out their production and consumption of fossil fuels, as rising oil prices and climate shocks threaten energy and human security.
In his farewell speech to the UN General Assembly (UNGA) in New York on Tuesday, outgoing UN Secretary-General António Guterres for the first time urged “every government to adopt a national plan to transition away from fossil fuels” aligned with limiting warming to 1.5C. The plans, he said, should include “clear timelines and protection for affected workers and communities”.
“We know fossil fuel interests won’t step aside on their own. For decades, Big Oil has treated the atmosphere as an open sewer – and cashed in on the consequences,” Guterres told diplomats in his speech opening the leaders’ segment of the assembly, also calling out the industry’s windfall profits after Russia’s invasion of Ukraine.
At last year’s COP30 climate summit in Belém, a group of about 80 governments led a failed push to develop a global roadmap to transition away from fossil fuels. Brazil instead proposed to draft a voluntary report that will be presented this year ahead of COP31 after countries and organisations submitted their views to the process.
Governments first agreed to transition away from fossil fuels in energy systems at COP28 in Dubai in 2023, but have since failed to agree at UN climate talks on how to move forward with that commitment, as efforts to do so have been effectively blocked by large fossil fuel-producing countries.
France, Netherlands issue plans
A few countries have moved forward with their own transition plans. France launched the first one at an international conference on the issue in April and the Netherlands followed suit this month. Not being major fossil fuel producers, both European nations aim to end their coal, oil and gas consumption by 2050, although the Dutch plan was criticised for not setting specific phase-out dates for the dirty fuels.
Adão Soares Barbosa, climate ambassador from Timor-Leste and chair of the Least Developed Countries (LDC) group in the UN climate negotiations, told a press briefing on Tuesday that last year’s discussions on shifting away from fossil fuels need to continue at COP31, adding that developed countries should lead the way with transition plans and curb their use of fossil fuels.
“We are expecting that we can make a request to major-emitting countries to limit emissions from this sector,” he said. “For LDCs, we’ll also try to reduce fossil fuel use, but it will depend on national circumstances.”
Samoa’s lead negotiator Anna Rasmussen said small island states have outlined their energy transition plans in their nationally determined contributions (NDCs) – countries’ plans for meeting the Paris Agreement goals – but added “we’re still waiting” for climate finance to help implement those plans.
Despite the global push to clean up the energy mix, countries leading climate talks are themselves also expanding fossil fuel production. COP31 co-presidents Australia and Türkiye have both recently given the green light to mine and drill more coal, oil and gas, and still depend on fossil fuels for 60% and 56% of their electricity production respectively.
Fossil fuel expansion threatens COP31 hosts’ credibility, experts warn
COP30 host nation Brazil has also persisted with its plans to explore potential new oil reserves near the mouth of the Amazon River – a region known as the Equatorial Margin.
These are moving ahead despite President Luiz Inácio Lula da Silva announcing last year at the Belém climate summit that the country would develop its own fossil fuel phase-out plan. This is still under development with little information about its progress and may be hampered by elections next month.
“We have achieved our self sufficiency in oil and will continue to explore the potential of new reserves, such as those in the Equatorial Margin,” Lula said in his speech to the UNGA on Tuesday. “But we will not abandon the environmental agenda,” he insisted. “We will move forward with the roadmap for the decarbonisation of the Brazilian economy.”
Transition far cheaper than status quo
Speaking at the main Climate Week NYC venue, Mads Christensen, executive director of Greenpeace International, said given the fast-shifting cost dynamics for both fossil fuels and renewables, countries should revise their existing energy plans because they are now out of date.
Gas power generation now costs around 150 euros per megawatt compared with around 50 euros for solar with battery storage – making the latter two-thirds cheaper.
“If these plans were updated, I think we would have a much faster transition because it simply makes good financial sense,” he said.


Tzeporah Berman, founder and chair of the Fossil Fuel Treaty Initiative, told Climate Home News that the Santa Marta process for transitioning away from fossil fuels (TAFF), launched at April’s conference, could help countries discuss, design and develop their national roadmaps, as well as mobilise the international cooperation required to actually deliver them.
“Many countries want not only national roadmaps but a global roadmap off the highway to hell,” she added. “A global plan is necessary to ensure the rules aren’t rigged against those who want to do the right thing and so all countries can make credible commitments.”
The second TAFF conference will be held in the Pacific island nation of Tuvalu next spring, co-chaired by Ireland. In New York, Tuvalu’s climate minister Maina Vakafua Talia called for stepped-up efforts to tackle the fossil fuel use that is threatening his country’s “demise” by driving global warming.
“The world is running out of time, and so I ask every government to come to… Tuvalu with solutions – real solutions, not false solutions – for us to ensure that we have a pathway and a way forward,” he urged.
The post UN chief urges countries to adopt fossil fuel transition plans with timelines appeared first on Climate Home News.
UN chief urges countries to adopt fossil fuel transition plans with timelines
Climate Change
COP31 electrification pledge leaves out clean power commitment
COP31’s flagship initiative to accelerate the electrification of the world’s economy has been criticised for failing to include a commitment to produce the power from clean energy.
Governments that sign the voluntary pledge at this year’s UN climate summit will commit to increasing electricity’s share of total energy consumption to 35% globally by 2035 in line “with pathways consistent with keeping 1.5C alive”, the text unveiled by the Turkish presidency on Tuesday says.
While the document says that the electrification goal is “complementary to efforts to expand renewable energy and improve energy efficiency”, governments are not explicitly asked to commit to producing the extra power with clean sources and driving down greenhouse gas emissions.
The text instead says the “use of clean electricity” will vary according to national circumstances. Fossil fuels are not mentioned by name, although the pledge cites the COP28 Global Stocktake decision, which called for “transitioning away from fossil fuels” in energy systems.
COP31 president Murat Kurum said earlier this month that the push to make electrification more “widespread” – through measures like the rollout of electric vehicles and heat pumps – will “automatically” lead to a reduction in the use of fossil fuels.
But many campaigners disagree, criticising the proposed pledge for failing to give an explicit signal on the fossil fuel transition.
Lack of clarity on energy sources
“Let’s not let electrification become the Trojan horse of our times, used to hide new fossil fuel consumption rather than promote renewable energy,” Claire Smith from civil society umbrella group Beyond Fossil Fuels said in reaction to the pledge’s publication.
She added that the commitment will only help address the climate crisis if electrification is powered by a flexible energy system where solar and wind are complemented by enhanced grids and storage.
The pledge’s text says that the electricity goal should be supported by “diverse and sustainable energy sources”, but it stops short of explaining what these sources are.
Alden Meyer, an international climate policy expert and senior associate at think-tank E3G, said the details of the pledge matter to how effective it will be in helping bring planet-heating emissions down.
“It has to be clean, and we haven’t got enough clarity on a guarantee that it will be a decarbonisation move,” he told Climate Home News.
China’s industrial engine starts to break its fossil fuel habit
According to an annual electricity review from energy think-tank Ember, in 2025 renewables edged ahead of coal power for the first time in 100 years. Continued growth in solar and wind pushed the share of renewables above a third of global electricity generation to just under 34%, compared with coal at 33%, it said.
Janet Milongo, energy Transition lead at CAN International, said success cannot be measured simply by how much of the world’s final energy consumption becomes electric.
“We must ask what generates that electricity, who has access to it, who owns the infrastructure, and whether it is helping communities transition away from fossil fuels,” she added.
Electrification alone can’t meet climate goals
Analysis published by the IEA on Tuesday, alongside the pledge, found that it would already be cost-effective to raise electricity’s share of global energy use from 23% today to around 33% with existing technologies, putting the COP31 goal “within striking distance”. Based on current policies, however, the share reaches only about 30% by 2035.
Hitting the 35% target would cut fossil fuel importers’ import bills by around $400 billion a year by 2035, the IEA said. At the higher prices caused by the conflict in the Middle East, that saving rises to more than $500 billion.
Speaking at New York Climate Week on Tuesday, IEA executive director Fatih Birol said the agency’s figures show that in 2026, about 80% of all new power plants built will run on renewables, with a few percentage points coming from nuclear power and the rest from fossils fuels. “So therefore, electrification itself will lead reduction of the [greenhouse gas] emissions,” he added.


However, the IEA warned in its new report that electrification “by itself is not enough” to meet the world’s climate targets. It noted that, if “low-emission” sources of power continue to simply grow in line with current policy scenarios, that would be only just enough to cover the extra demand from electrification, driving a modest decline in emissions.
Matt Webb, associate director of global clean power diplomacy at E3G, said the pledge is a “welcome signal of leadership” and can help COP31 be a “critical moment” for countries to double down on the energy commitments made at COP28.
But to secure the full benefits of electrification, he added, it is essential that we “urgently clean up” by speeding up the rollout of renewables and developing credible national plans to transition away from fossil fuels.
The post COP31 electrification pledge leaves out clean power commitment appeared first on Climate Home News.
COP31 electrification pledge leaves out clean power commitment
Climate Change
As loss and damage fund stalls, Nepal crowdfunds flood relief
People around the world have donated almost $90 million to a government-led campaign to help Nepal recover from its recent devastating Himalayan flood, according to a Nepali climate negotiator, even as the UN chief slammed the tiny amount of money in a new fund to deal with such disasters.
Individuals and companies from Nepal and abroad have chipped in from $5 to “many millions” of dollars to the Prime Minister’s Disaster Relief Fund, Manjeet Dhakal, an advisor to the poorest countries at UN climate talks, told an event on Monday focused on early warning systems.
The prompt and substantial response from the public contrasts with the slower, more limited support that is potentially on offer from the UN’s new Fund for Responding to Loss and Damage (FRLD), set up by governments to compensate developing countries for climate disasters.
Comment: Human security relies on adapting to the world’s new climate reality
Over three weeks have passed since Nepal’s finance and environment ministers asked the FRLD board to take an urgent decision to allocate funding to help Nepal protect people and restore essential services in the wake of the disaster, which caused around 1,450 deaths and left more than 5,000 people missing.
“Time is of the essence,” the ministers wrote in an appeal to the FRLD on August 31, which was swiftly followed by a letter from a group of developing-country board members urging the FRLD board’s co-chairs to organise an extraordinary meeting to come up with a response.
Loss and damage fund hesitates
Yet, despite informal online meetings, the co-chairs have yet to convene a meeting with the power to allocate funds. The board’s next scheduled meeting begins on December 15.
Dhakal said on Monday that the request has “received some positive response, but still there is some discussion ongoing about how to respond to that”.
“If they can’t respond in a timely manner, then is [the fund] fit for purpose in terms of disasters that the world would be facing in the coming years? The scale and intensity of these disasters is increasing,” he said.
With just $820 million pledged to it by rich countries and not all of that yet delivered, the FRLD has earmarked just $350 million to spend in its initial phase and without further contributions could run out of money next year.
Because of these limited funds, and a huge number of requests for funding totalling nearly $3 billion, the FRLD has said it will only give out a maximum of $20 million to each project for now. It has yet to approve funding for any projects.
Dhakal recently told The Nation magazine that this amount was just a “symbolic gesture”. Nepal’s government has estimated the costs of recovery and reconstruction at $4.8 billion, with homes, roads, bridges, hospitals and hydropower stations in the affected area needing to be repaired and rebuilt.
“Ridiculously small” funding
In a speech to the UN General Assembly on Tuesday, the body’s outgoing Secretary-General António Guterres criticised the “ridiculously small” level of funds made available by wealthy governments to the FRLD. Developed countries should “make the loss and damage fund work at scale”, he said.

The Portuguese diplomat told world leaders that when he travelled to Nepal three years ago, he had “sounded the alarm on accelerating glacier melt, warning that the rooftops of the world are caving in”.
“Some dismissed it all as overstating dangers, but as tragic events have shown, impacts are arriving sooner, hitting harder, and spreading further than many anticipated,” he said.
A recent study by scientists with the World Weather Attribution group found that climate change contributed to the rock-ice avalanche which sparked a huge flash flood along a river valley on the Nepal-Tibet border.
Speaking at a separate event in New York on Monday, leading climate scientist Johan Rockström highlighted those findings on the role of global warming in the Himalayan disaster.
“This will be potentially the first poster-child case of a loss and damage invoice, because here we have a proven case of a catastrophe which would not have occurred if it hadn’t been for human-caused climate change,” he said.
The post As loss and damage fund stalls, Nepal crowdfunds flood relief appeared first on Climate Home News.
As loss and damage fund stalls, Nepal crowdfunds flood relief
-
Greenhouse Gases2 years ago嘉宾来稿:满足中国增长的用电需求 光伏加储能“比新建煤电更实惠”
-
Climate Change1 year ago
Guest post: Why China is still building new coal – and when it might stop
-
Greenhouse Gases1 year ago
Guest post: Why China is still building new coal – and when it might stop
-
Climate Change2 years ago嘉宾来稿:满足中国增长的用电需求 光伏加储能“比新建煤电更实惠”
-
Renewable Energy11 months agoSending Progressive Philanthropist George Soros to Prison?
-
Climate Change2 years ago
Bill Discounting Climate Change in Florida’s Energy Policy Awaits DeSantis’ Approval
-
Greenhouse Gases1 year ago
嘉宾来稿:探究火山喷发如何影响气候预测
-
Carbon Footprint2 years agoUS SEC’s Climate Disclosure Rules Spur Renewed Interest in Carbon Credits


