Welcome to Carbon Brief’s DeBriefed.
An essential guide to the week’s key developments relating to climate change.
This week
Trump ‘SOS’
‘CHAOS’ GRIPS: More than 1,900 scientists from US national academies of sciences, engineering and medicine wrote an “SOS letter” warning of the risks to science imposed by the current administration’s grant cuts and mass layoffs, reported the Guardian. The Guardian also said a “sense of chaos has gripped” the National Oceanic and Atmospheric Administration, after Trump-sanctioned layoffs have affected 20% of staff.
WEAKER STANDARDS: Trump is weighing returning to weaker car emissions standards from 2020, saying pollution limits introduced by Joe Biden are “too onerous” for motor companies, Bloomberg reported. The US transportation sector is the country’s leading source of greenhouse gas emissions.
TARIFFS TURMOIL: The New York Times said that the renewable energy industry in the US is “bracing for particularly large effects” from Trump’s ongoing tariffs war with the rest of the world. It noted that the turmoil is “expected to drive up the costs of nearly every component of clean-energy production in the US, from the steel in wind turbines to the batteries in electric vehicles”.
Around the world
- SOFTENING GOALS: EU Climate Commissioner Wopke Hoekstra is considering softening the bloc’s 2040 climate goal amid a “backlash” from some quarters, Politico said. A second Politico story reported that the release of the goal will be delayed while Hoekstra “struggles” to rally support.
- COAL STICKS: The world’s total coal-fired power “inched up” by 18.8 gigawatts in 2024, the lowest rise in two decades, with new additions in China and India continuing to offset closures elsewhere, according to Reuters coverage of a new Global Energy Monitor report.
- ASIA HEAT: Large swathes of India will experience intense heatwaves this summer with above normal temperatures expected across much of the country, the nation’s meteorological office has warned, according to BBC News.
- RENEWABLE AFRICA: Africa increased its renewable energy capacity by 6.7% last year, equivalent to 4.2GW, according to an International Renewable Energy Agency report covered by Energy Capital and Power. Egypt, Ethiopia and South Africa were among countries to build the most clean power.
40%
The percentage by which the “average person would become poorer” if the world warmed by 4C, according to an Environmental Research Letters study covered by the Guardian.
Latest climate research
- An “extraordinary” heatwave in Central Asia in March was made up to 10C hotter by human-caused climate change, a new World Weather Attribution analysis found.
- A Proceedings of the National Academy of Science study found that the limits of human heat tolerance are lower than previous estimates.
- Climate change has played a dominant role in destabilising communities of plankton, microorganisms that form the basis of the food web for marine wildlife, a new study in Communications Earth and Environment found.
(For more, see Carbon Brief’s in-depth daily summaries of the top climate news stories on Monday, Tuesday, Wednesday, Thursday and Friday.)
Captured

China’s exports of solar panels to the global south have doubled in the past two years, overtaking global-north sales for the first time since 2018, according to data from the thinktank Ember explained in a new Carbon Brief guest post. Saudi Arabia and Pakistan were among the top importers of Chinese solar panels in 2024.
Spotlight
Deep-sea mining talks
Carbon Brief explains the outcomes of the latest deep-sea mining talks held last week in Jamaica.
The deep sea has emerged as a new mining frontier in the global race towards energy security, with countries vying to explore and exploit its reserves of metals, such as nickel, copper, cobalt and manganese.
These minerals – critical to the energy transition – are held in the deep ocean’s nodules, hydrothermal vents and crusts, but the impacts of mining these deposits are still far from being fully understood.
In 2021, the Pacific island state of Nauru triggered a legal process for countries to agree rules around mining the seabed, or – in their absence – allow commercial mining of the deep sea to begin by 2025.
The UN Convention on the Law of the Sea (UNCLOS) is an international treaty that provides a framework to regulate the use of the world’s seas and oceans.
Among other bodies and orders, UNCLOS established the International Seabed Authority (ISA), which is based in Kingston, Jamaica, and oversees all resource extraction in the deep sea.
From 17-28 March this year, the ISA held the first part of its 30th annual session, with the aim of making progress on draft rules to govern commercial deep-sea mining.
Jamaica talks

The ISA said that there was “significant progress” on various aspects at the meeting and other areas that “require further deliberation”.
Some of this progress is the agreement to use the term “harmful effects” rather than “serious harm” to the marine environment, which aligns with the UN Convention on the Law of the Sea (UNCLOS), the Earth Negotiations Bulletin noted.
However, it added that there were “major issues unresolved”, related to “regulations” crucial for the protection of the marine environment, such as environmental impact assessments and the rights and interests of coastal states.
Duncan Currie, the international legal advisor to the Deep-Sea Conservation Coalition, said parties did not agree on any of the 55 reviewed regulations, but rather just discussed their positions on those regulations.
He also pointed out the lack of discussion over financial matters, liability, the royalties that are paid and the benefit sharing from deep-sea mining, telling Carbon Brief:
“There are 80 standards and guidelines that can’t be developed until [countries] have developed the regulations. I think most people think that they’re quite a long way away from being adopted.”
Current and future outlook
So far, 32 ISA member states are in favour of a moratorium on deep-sea mining, while other countries are seeking to exploit minerals in the seafloor “as soon as possible”.
Among those promoting the deep-sea mining industry are India, China and Norway, while countries such as Palau, Fiji and Samoa are promoting a “pause on deep-sea mining until its ecological impacts are better understood”, Carbon Brief previously reported.
In a surprise move that sent “alarm bells ringing” in the ISA and beyond, the US subsidiary of the Metals Company announced on 27 March that it is moving ahead with applying for deep-sea exploration permits under existing US legislation in the second quarter of 2025.
The announcement came on the last day of the ISA talks, where it dominated discussions at the end of the meeting.
On 31 March, Reuters reported that the Trump administration is “weighing an executive order” that could let miners bypass the ISA, its safeguards and “fast-track” permits. The US is not a party to UNCLOS.
Both developments signal that the ISA is “at a crossroads”, according to the Earth News Bulletin, and its next session in July will be closely watched for how the body responds to a potential unilateral action to allow deep sea-mining.
Watch, read, listen
NOT WITH SPORTS: A Discovery+ documentary explored how extreme weather is already affecting sport events.
STRENGTHENING MENTAL HEALTH: A psychologist writing in the Revelator offered strategies to reduce the effects of climate change on mental health.
FOSSIL LOBBY: Former UN climate chief Christiana Figueres and political strategist Tom Rivett-Carnac addressed the fossil fuel lobby within COPs on their Outrage and Optimism podcast.
Coming up
- 2-5 April: Global Youth Climate Summit, Belo Horizonte, Brazil
- 7 April: International Mother Earth Day
- 7-11 April: International Maritime Organization Marine Environment Protection Committee meeting (MEPC 83), London
Pick of the jobs
- Sky News, senior news editor – science, climate and technology | Salary: Unknown. Location: London
- Australian National University, postdoctoral research fellow in climate systems | Salary: AU$85,010-$131,227. Location: Canberra, Australia
- Dialogue Earth, social media officer | Salary: £36,035 per annum. Location: London
- Grantham Research Institute on Climate Change and the Environment, policy officer (adaptation policy and governance) | Salary: from £42,679-£54,730. Location: London
DeBriefed is edited by Daisy Dunne. Please send any tips or feedback to debriefed@carbonbrief.org.
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The post DeBriefed 4 April 2025: Scientists issue Trump ‘SOS’; EU climate goal in jeopardy; Deep-sea mining talks appeared first on Carbon Brief.
Climate Change
Zeldin Celebrates Endangerment Finding Repeal With Climate Skeptics
Casting doubt on the determination that greenhouse gas emissions endanger public health and welfare, he said, “we’re not accepting all of the narrative of the left without any question or pushback.”
WASHINGTON—Addressing a conference of scientists and other experts skeptical of climate change, Environmental Protection Agency Administrator Lee Zeldin on Wednesday celebrated his decision to repeal what is known as the “endangerment finding,” which provided the backbone for federal regulation of greenhouse gas emissions.
Zeldin Celebrates Endangerment Finding Repeal With Climate Skeptics
Climate Change
The Global Energy Supply in a Decade ‘Is Not a World We’re Going to Recognize’
With the U.S. bombing Iran and the Strait of Hormuz closed, energy experts say countries transitioning to renewables will be more resilient in the “face of the shock.”
The United States’ war on Iran could fundamentally alter how countries consume and generate energy and hamper international progress in combating climate change, a panel of energy experts said today.
The Global Energy Supply in a Decade ‘Is Not a World We’re Going to Recognize’
Climate Change
Iran war analysis: How 60 nations have responded to the global energy crisis
One month into the US and Israel’s war on Iran, at least 60 countries have taken emergency measures in response to the subsequent global energy crisis, according to analysis by Carbon Brief.
So far, these countries have announced nearly 200 policies to save fuel, support consumers and boost domestic energy supplies.
Carbon Brief has drawn on tracking by the International Energy Agency (IEA) and other sources to assess the global policy response, just as a temporary ceasefire is declared.
Since the start of the war in late February, both sides have bombed vital energy infrastructure across the region as Iran has blocked the Strait of Hormuz – a key waterway through which around a fifth of global oil and liquified natural gas (LNG) trade passes.
This has made it impossible to export the usual volumes of fossil fuels from the region and, as a result, sent prices soaring.
Around 30 nations, from Norway to Zambia, have cut fuel taxes to help people struggling with rising costs, making this by far the most common domestic policy response to the crisis.
Some countries have stressed the need to boost domestic renewable-energy construction, while others – including Japan, Italy and South Korea – have opted to lean more on coal, at least in the short term.
The most wide-ranging responses have been in Asia, where countries that rely heavily on fossil fuels from the Middle East have implemented driving bans, fuel rationing and school closures in order to reduce demand.
‘Largest disruption’
On 28 February, the US and Israel launched a surprise attack on Iran, triggering conflict across the Middle East and sending shockwaves around the world.
There have been numerous assaults on energy infrastructure, including an Iranian attack on the world’s largest LNG facility in Qatar and an Israeli bombing of Iran’s gas sites.
Iran’s blockade of the Strait of Hormuz, a chokepoint in the Persian Gulf, is causing what the IEA has called the “largest supply disruption in the history of the global oil market”.
A fifth of the world’s oil and LNG is normally shipped through this region, with 90% of those supplies going to destinations in Asia. Without these supplies, fuel prices have surged.
Governments around the world have taken emergency actions in response to this new energy crisis, shielding their citizens from price spikes, conserving energy where possible and considering longer-term energy policies.
Even with a two-week ceasefire announced, the energy crisis is expected to continue, given the extensive damage to infrastructure and continuing uncertainties.
Asian crunch
Carbon Brief has used tracking by the IEA, news reports, government announcements and internal monitoring by the thinktank E3G to assess the range of national responses to the energy crisis roughly one month into the Iran war.
In total, Carbon Brief has identified 185 relevant policies, announcements and campaigns from 60 national governments.
As the map below shows, these measures are concentrated in east and south Asia. These regions are facing the most extreme disruption, largely due to their reliance on oil and gas supplies from the Middle East.

Nations including Indonesia, Japan, South Korea and India are already spending billions of dollars on fuel subsidies to protect people from rising costs.
At least 16 Asian countries are also taking drastic measures to reduce fuel consumption. For example, the Philippines has declared a “state of national emergency”, which includes limiting air conditioning in public buildings and subsidising public transport.
Other examples from the region include the government in Bangladesh asking the public and businesses to avoid unnecessary lighting, Pakistan reducing the speed limit on highways and Laos encouraging people to work from home.
Europe – which was hit hard by the 2022 energy crisis due to its reliance on Russian gas – is less immediately exposed to the current crisis than Asia. However, many nations are still heavily reliant on gas, including supplies from Qatar.
The continent is already feeling the effects of higher global energy prices as countries compete for more limited resources.
At least 18 European nations have introduced measures to help people with rising costs. Spain, which is relatively insulated from the crisis due to the high share of renewables in its electricity supply, nevertheless announced a €5bn aid package, with at least six measures to support consumers.
Many African countries, while also less reliant on direct fossil-fuel supplies via the Strait of Hormuz than Asia, are still facing the strain of higher import bills. Some, including Ethiopia, Kenya and Zambia, are also facing severe fuel shortages.
There have been fewer new policies across the Americas, which have been comparatively insulated from the energy crisis so far. One outlier is Chile, which is among the region’s biggest fuel importers and is, therefore, more exposed to global price increases.
Tax cuts
The most common types of policy response to the energy crisis so far have been efforts to protect people and businesses from the surge in fuel prices.
At least 28 nations, including Italy, Brazil and Australia, have introduced a total of 31 measures to cut taxes – and, therefore, prices – on fuel.
Even across Africa, where state revenues are already stretched, some nations – including Namibia and South Africa – are cutting fuel levies in a bid to stabilise prices.
Another 17 countries, including Mexico and Poland, have directly capped the price of fuel. Others, such as France and the UK, have opted for more targeted fuel subsidies, designed to support specific vulnerable groups and industries.
These measures are all shown in the dark blue “consumer support” bars in the chart below.

Such measures can directly help consumers, but some leaders, NGOs and financial experts have noted that there is also the risk of them driving inflation and reinforcing reliance on the existing fossil fuel-based system.
Christine Lagarde, president of the European Central Bank, spoke in favour of short-term measures to “smooth the shock”, but noted that “broad-based and open-ended measures may add excessively to demand”.
Measures to conserve energy, of the type that many developing countries in Asia have implemented extensively, have been described by the IEA as “more effective and fiscally sustainable than broad-based subsidies”.
So far, there have been at least 23 such measures introduced to limit the use of transport, particularly private cars.
These include Lithuania cutting train fares, two Australian states making public transport free and Myanmar and South Korea asking people to only drive their cars on certain days.
Clean vs coal
At least eight countries have announced plans to either increase their use of coal or review existing plans to transition away from coal, according to Carbon Brief’s analysis. These include Japan, South Korea, Bangladesh, the Philippines, Thailand, Pakistan, Germany and Italy.
These measures broadly involve delaying coal-plant closure, as in Italy, or allowing older sites to operate at higher rates, as in Japan – rather than building more coal plants.
There has been extensive coverage of how the energy crisis is “driving Asia back to coal”. However, as Bloomberg columnist David Fickling has noted, this shift is relatively small and likely to be offset by a move to cheap solar power in the longer term.
Indeed, some countries have begun to consider changes to the way they use energy going forward, amid a crisis driven by the spiralling costs of fossil-fuel imports.
Leaders in India, Barbados and the UK have explicitly stressed the importance of a structural shift to using clean power. Governments in France and the Philippines are among those linking new renewable-energy announcements with the unfolding crisis.
New renewable-energy capacity will take time to come online, albeit substantially less time than developing new fossil-fuel generation. In the meantime, some nations are also taking short-term measures to make their road transport less reliant on fossil fuels.
For example, the Chilean government has enabled taxi drivers to access preferential credit for purchasing electric vehicles (EVs). Cambodia has cut import taxes on EVs and Laos has lowered excise taxes on them.
Finally, there have been some signs that countries are reconsidering their future exposure to imported fossil fuels, given the current economics of oil and gas.
The New Zealand government has indicated that a plan to build a new LNG terminal by 2027 now faces uncertainty. Reuters reported that Vietnamese conglomerate Vingroup has told the government it wanted to abandon a plan to build a new LNG-fired power plant in Vietnam, in favour of renewables.
The post Iran war analysis: How 60 nations have responded to the global energy crisis appeared first on Carbon Brief.
Iran war analysis: How 60 nations have responded to the global energy crisis
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