The Trump administration in the US has imposed tariffs on all imports from China, Mexico and Canada, as well as on steel, aluminium and cars from around the world.
In response, the US has been hit with retaliatory tariffs from major trading partners, including the EU.
US president Donald Trump has said he intends to launch a further round of reciprocal tariffs on 2 April, targeting a broader range of countries.
This escalating “trade war” is expected to slow global growth and has also triggered warnings of a US recession.
Global energy flows and efforts to tackle climate change are already being affected by the escalating trade tensions.
The tariffs are expected to disrupt the global trade in clean technologies, from electric cars to the materials used to build wind turbines.
At the same time, as high-emitting industries face higher costs, some commentators have suggested that tariffs could hamper US plans for fossil-fuel expansion.
And as clean technology becomes more expensive to manufacture in the US, other nations – particularly China – are likely to step up to fill in any gaps.
Carbon Brief has asked a range of researchers and policy experts what they think Trump’s tariffs could mean for global climate action and energy supplies.
These are their responses, first as sample quotes, then, below, in full:
- Dr Kyle Chan: “With US automakers struggling to compete, Chinese electric vehicle companies will likely gain a stronger position.”
- Elisabetta Cornago: “China may redirect its exports towards the relatively open EU market, challenging homegrown clean-tech industries at a time when the EU is trying to support and revitalise them.”
- Dr Bentley Allan and Dr Tim Sahay: “G7 and G20 countries are strengthening their domestic economies with deficit financing and directed investments into strategic sectors, such as green and digital sectors”
- Alex Muresianu: “A less productive US economy, which must pay higher prices for key inputs, is one that can spare fewer resources to address climate change.”
- Antoine Vagneur-Jones: “The administration’s fondness for data centres requires significant grid investment and yet the US relies on its neighbours for its supply of large power transformers.”
- Jimena Blanco: “The US is mainly or wholly import-reliant for around four-fifths of its identified 50 critical minerals, including from its partners Canada and Mexico.”
- Dr Simi Thambi: “An increase in trade protectionism is not good for climate action.”
- Robert Rozansky: “One upside to Trump’s trade war is that it might stymie his efforts to push US liquified natural gas (LNG) expansion into overdrive.”
- Chris Severson-Baker: “The Canadian oil and gas lobby…has been using this moment to make the case for more oil and gas production and infrastructure.”
- Anne-Sophie Corbeau: “Trump’s tariffs have already had an impact on LNG trade…China has not imported a single US LNG cargo since 6 February.”
- Avantika Goswami: “Tariffs – if imposed widely – may hurt the exports of countries like India, which nurture aspirations to mimic China’s role as an exporter of green goods.”
- Tu Le: “If manufacturers have to move multiple factories, that changes, reduces or eliminates what would have likely been more investment in research and development for clean energy vehicles.”
- Ellie Belton: “A more unpredictable US could create opportunities for the UK and EU to attract low-carbon investment and gain a competitive edge in the energy transition.”
- Eileen Torres Morales: “The effects of Trump’s tariffs on the global transition to green iron and steelmaking are still uncertain.”
- Dr Aurélien Saussay: “When faced with increased economic pressures from tariffs, countries could be more tempted to relax environmental standards to maintain competitiveness.”
Dr Kyle Chan
Postdoctoral researcher and author of High Capacity
Trump’s tariffs will likely have wide-ranging effects on China’s clean-tech industry and global climate progress. Higher tariffs on China will directly impact US imports of Chinese clean tech goods, such as lithium batteries, which reached $1.9bn in December 2024.
Chinese solar manufacturing firms will also be hit indirectly through tariffs on production sites in south-east Asia, which collectively supplies 80% of US solar imports. Meanwhile, China’s retaliation could disrupt US access to critical minerals for its own clean-tech industry. This includes graphite for battery anodes and rare earth metals for wind turbines.
The impact on China’s electric vehicle industry in particular will be consequential, albeit less direct. Chinese electric vehicle imports to the US, which were already minimal, will not be significantly affected by Trump’s new tariffs.
However, the broader disruption to automotive supply chains across Mexico and Canada – along with rising steel and aluminium costs – will weaken the ability of US automakers to transition to electric vehicles. This will benefit Chinese electric vehicle makers, which continue to innovate and drive down costs.
With US automakers struggling to compete, Chinese electric vehicle companies will likely gain a stronger position, not just in China’s domestic market, but globally as well.
Elisabetta Cornago
Senior research fellow, EU energy and climate policy
Centre for European Reform
The Trump administration is walking back on US climate commitments, both domestically by threatening to cut back Inflation Reduction Act (IRA) support for clean-tech industries and internationally, [by] withdrawing from the Paris Agreement. US tariffs can also affect climate action and the energy transition globally, hitting global value chains for clean technologies.
The Trump administration has levied tariffs on primary materials, such as steel and aluminium, on the EU as well as on China. This will increase manufacturing costs for US-based producers of goods that rely on imports of those materials, such as wind turbines and electric vehicles.
But, at the same time, because of interconnections in global value chains, the EU will also be impacted by US tariffs that are currently limited to China.
Tariffs on Chinese exports of solar panels, electric vehicles and batteries to the US, for example, will reinforce China’s overcapacity in manufacturing in all these sectors, relative to weak Chinese demand. As a consequence, China may redirect its exports towards the relatively open EU market, challenging homegrown clean tech industries at a time when the EU is trying to support and revitalise them.
Trump’s self-harming retreat on climate and tariffs has caused uncertainty for clean energy, industry and trade. There is a macroeconomic slowdown that could negatively impact the rising green investments of the last decade.
However, countries are strategic actors, not just passive victims of US trade policy. We are observing G7 and G20 countries take anticipatory steps.
First, they are strengthening their domestic economies with deficit financing and directed investments into strategic sectors, such as green and digital sectors. A few examples:
- The monumental shift in German fiscal policy will now enable investments in climate.
- The overhaul of EU’s fiscal rules and greater funding of the EU’s industrial deal with over €100bn to support clean manufacturing.
- Brazilian president Luiz Inácio Lula da Silva has unfurled Nova Industria Brasil to build green industrialisation.
- Mexican president Claudia Sheinbaum has announced and funded Plan Mexico for strategic investments.
Many nations are also diversifying their markets and multilateralist diplomacy. Targets of Trump tariff threats are involved in a flurry of trade and investment deals:
- Within Asia, there are negotiations to green the world’s largest trade bloc – the Regional Comprehensive Economic Partnership.
- Trade deals between Mexico-EU, EU-Brazil and Canada-EU are being revamped to allow more green trade.
- Countries such as Brazil and South Africa are leading diplomatic efforts through their presidencies of BRICS and G20 this year to articulate new trading and financial architecture that gives them the policy space to pursue green structural transformation to meet domestic and global climate goals.
Alex Muresianu
Senior policy analyst
Tax Foundation
At the most basic level, gains from trade are valuable. Historically, trade barriers have slowed the spread and adoption of new technology. The fight against climate change is just one example of the many economic challenges these tariffs will make more difficult.
Tariffs on important inputs make building more expensive and distort the US economy toward less productive activity. A less productive US economy, which must pay higher prices for key inputs, is one that can spare fewer resources to address climate change.
Advocates of Trump’s approach to trade often invoke competition with China as a justification. However, most of Trump’s tariffs are targeted at allied or friendly nations, such as Canada, Mexico and members of the EU. US policymakers are worried about losing an innovation race with China in areas like electric vehicles or other green technologies, but putting up barriers to other markets will make us less – not more – competitive in the long term.
Antoine Vagneur-Jones
Head of trade and supply chains
BloombergNEF
The tariffs jar with priorities that are – at least rhetorically – at the heart of the Trump presidency.
The administration’s fondness for data centres requires significant grid investment and yet the US relies on its neighbours for its supply of large power transformers. Expanding manufacturing is another apparent priority, but increasing the cost of inputs will crimp domestic industry.
And by hurting cross-border value chains and taxing imported crude, the tariffs could conceivably disadvantage traditional internal combustion engine vehicles more than their electrified equivalents.
Jimena Blanco
Chief analyst
Verisk Maplecroft
Against a background of tariffs and disrupted trading relationships, we are seeing a more protectionist stance towards critical minerals emerging, further complicating clean-tech supply chains.
Our research shows resource nationalism is accelerating. Among the emerging markets, 17 major critical mineral producers have seen a significant increase in risk in the past five years, including Chile and Peru – both key sources of lithium and copper.
Exact details of the new US tariff regime won’t be known until 2 April, but it is likely that the next batch of tariffs will be levied most heavily on countries with the largest trade imbalances. These countries represent the majority of Washington’s key global trade partners, meaning disruptions to supply chains – including in minerals essential for the energy transition – are increasingly likely.
The US is mainly or wholly import-reliant for around four-fifths of its identified 50 critical minerals, including from its US-Mexico-Canada Agreement (USMCA) partners Canada and Mexico. If Canada, for example, responds to the imposition of tariffs by the US with new export taxes, bans or restrictions on mineral exports, increasing costs or supply shortages are a prospect that US businesses will have to adapt to.
There is potential for US tariffs to slow the rollout of green policies if nations view renewables mandates or more stringent carbon regulation as adding additional burdens to their economy at a time of increasing trade friction. However, this could be counterbalanced somewhat by investments in low-carbon solutions such as carbon capture, utilisation and storage (CCUS) or hydrogen.
Dr Simi Thambi
Climate economist
FAIRR
An increase in trade protectionism is not good for climate action. Climate scientists have conceptualised this as a scenario of rising retaliatory tariffs – Shared Socioeconomic Pathway 3 (SSP3) – where challenges to mitigation and adaptation are high, making it unlikely for the world to limit temperature rise to 1.5C by the end of the century. This scenario could lead to up to four times more emissions than a sustainability-focused pathway with low challenges to mitigation and adaptation.
Mitigation is very challenging in this scenario because reducing emissions is more expensive, as investments needed to scale clean technologies are not prioritised. As a result, these technologies fail to penetrate well into the markets that need them most cost-effectively. For example, according to the International Energy Agency’s (IEA) 2024 electric vehicle outlook, electric vehicle sales in emerging markets remain very low. Lowering global emissions without greening the transport sector in developing economies would be highly challenging.
Adaptation also faces considerable challenges in SSP3, because one can expect deforestation and cropland expansion to rise in this scenario, as countries focus on their national ambitions. Extensive deforestation would reduce ecosystems and biodiversity, reducing their adaptive capacity.
Robert Rozansky
Global LNG analyst and project manager, Europe gas tracker
Global Energy Monitor
The Trump administration has gone all in on promoting US LNG under its “America first”, “energy dominance” agenda. As it seeks to boost new LNG production projects that are still on the drawing board, such as the Alaska LNG project touted in the State of the Union address, the US could further exacerbate a global overbuild of LNG infrastructure that threatens international climate targets. At the same time, the Trump administration’s trade war may make these same proposed LNG projects more difficult to build and finance.
Tariffs will raise the cost of raw materials, such as steel, the “backbone of LNG facilities”. If tariffs lead to economy-wide inflation, labour could become more expensive, too. The LNG industry is no stranger to the toll of inflation. For example, the cost of the under-construction Golden Pass LNG Terminal rose by $2bn after its main contractor declared bankruptcy in May citing pandemic-related cost inflation and delays.
If it becomes more expensive to build LNG export terminals in the US, financiers committed to projects under construction may struggle to recover their investments and those evaluating proposed facilities may be hesitant to invest.
The longer proposed projects sit without financial backers, the less likely it is they will get off the ground at all. New US LNG terminals are already set to face steep competition from an incoming wave of export projects abroad and increasingly cheap renewable power, as an alternative to gas.
Given that LNG may be roughly as bad for the climate as coal, if not worse, one upside to Trump’s trade war is that it might stymie his efforts to push US LNG expansion into overdrive.
Chris Severson-Baker
Executive director
Pembina Institute
In Canada, this is unfolding into a national debate about how best to strengthen our economic resilience and ensure long-term prosperity in the face of a hostile US.
There is a risk that what president Trump is doing could cause knee-jerk reactions here in Canada. The Canadian oil and gas lobby, for example, has been using this moment to make the case for more oil and gas production and infrastructure, to get more of its products to markets outside the US.
While we agree that Canada needs to diversify its trading partners, doubling down on oil and gas exports would not provide the long-term economic resiliency and energy security our country is seeking right now. We should look instead at Europe, where governments are aggressively decarbonising their economies, not only for climate reasons. They also understand that clean energy and new technologies are associated with less price volatility and more secure supplies, as well as health and affordability benefits for citizens.
The EU’s forthcoming carbon border adjustment mechanism (CBAM) will give an advantage to low-carbon exports of steel, aluminium and cement. These are all industries that Canada is well-placed to lead on, given our abundance of emissions-free electricity to power them. However, this can only happen if we retain our nationwide industrial carbon pricing system.
That is also why the next big nation-building project we foresee in Canada is not oil and gas infrastructure, but widespread electrification, supported by a buildout and modernisation of our electricity grid. This would help Canadians become more resilient, both to the economic impacts of trade disputes and the physical and economic impacts of climate change.
Anne-Sophie Corbeau
Global research scholar at the Center on Global Energy Policy
Columbia University
Trump’s tariffs have already had an impact on LNG trade. After the Trump administration imposed new tariffs on China in early February 2025, China retaliated by announcing, among other things, a 15% tariff on US LNG. China and the US are not too dependent on each other in LNG trade, with US LNG representing only 6% of China’s LNG supply in 2024. But China has not imported a single US LNG cargo since 6 February, as Chinese offtakers of US LNG are diverting their cargoes to other regions to avoid tariffs.
However, China and the US are respectively the largest LNG importer and exporter globally. Chinese buyers have contracted significant amounts of US LNG between 2021 and 2023. Should tariffs persist or even increase, US LNG will likely continue to be diverted to other countries, making the whole global LNG market less efficient. Meanwhile, Chinese buyers may become hesitant to contract more US LNG.
Another country that may be at risk if trade relations deteriorate is Mexico. Mexico’s energy system is very dependent on gas. It is also uniquely dependent on imports of US pipeline gas, which is cheaper than LNG imports. There are also a few Mexican LNG export projects at different stages of advancement that rely on US gas supplies and are therefore in competition with US-based LNG projects. Uncertainties over the bilateral relationship could become a source of risk for Mexico.
Avantika Goswami
Programme manager, climate change
Centre for Science and Environment
Donald Trump’s use of tariffs as an economic weapon is an attempt to regain dominance in the US’ trade relationships, for varying reasons – one being the US’ massive trade deficit.
From a climate perspective, tariffs need to be situated within a larger picture. They are likely to raise costs for general goods in the US – and green goods are not excluded from this calculus. This comes at a time when the US is lagging behind east and south-east Asia in the manufacturing of green technologies and has been slow in its domestic energy transition.
Tariffs may further raise the cost of the transition in the US. In tandem with attempts to expand oil and gas production in the domestic energy mix as Trump promises – and also any successful reindustrialisation efforts – this could see a rise in US domestic emissions. Meanwhile, fossil fuel exports will raise emissions elsewhere.
Tariffs – if imposed widely – may hurt the exports of countries like India, which nurture aspirations to mimic China’s role as an exporter of green goods. There has been an increase in the export of solar technology from India to the US, with India’s share of the country’s module imports rising from 2.5% in 2022 to 10.7% in 2024, amounting to approximately $2bn in 2023-24. For a country with aspirations in green manufacturing, tariffs on green goods could undermine this positive momentum for India.
This shift toward protectionism in the US does not necessarily spell the collapse of the global green goods market. Instead, it may serve to strengthen China’s role in the global green technology supply chain.
Lastly, the return to protectionism, particularly green protectionism, is an act of hypocrisy by nations like the US, which have spent years denouncing the same policies at the World Trade Organization when undertaken by developing countries.
Tu Le
Managing director
Sino Auto Insights
It is important to take the Trump administration’s individual actions in totality, while also keeping in the back of your mind that the US is the second largest passenger vehicle market in the world. That drives the need for legacy automakers to sell into this market.
The tariffs force companies to review their long-term manufacturing strategy. If they have to move multiple factories, that changes, reduces or eliminates what would have likely been more investment in research and development for clean energy vehicles, due to their limited capital.
The Trump administration is also poised to eliminate the more stringent Environmental Protection Agency (EPA) vehicle emissions standards that would have taken effect in 2027. If successful, that would substantially reduce the urgency for global original equipment manufacturers to launch products with more efficient powertrains. And it pushes out the need for oil companies in Russia, the Middle East and the US to alter or reduce their investments in clean energy initiatives.
Legacy manufacturers play a role in this as well, since their leadership years ago seemed to be so bullish in their ability to easily move over to clean energy vehicles. Their initial sales forecasts for this timeframe were never realistic and it put a spotlight on this being a left versus right issue, when it should have been a discussion on energy independence all along.
The US and EU governments are likely to push out their net-zero targets [for vehicles]. They were arbitrary to begin with. Now, with the Trump administration in place and European automakers whining about their inability to meet the more stringent requirements, they seem more than likely to be delayed past 2035.
Ellie Belton
Senior policy advisor – trade and climate
E3G
It is hard to imagine a scenario in which higher tariffs will benefit the global energy transition. Even if clean technologies are not directly targeted, the complex nature of international supply chains means that there will inevitably be knock-on effects, such as through increased costs for component parts like steel and aluminium.
Retaliatory tariffs against the US will also create a domino effect, distorting trade flows worldwide and altering countries’ comparative advantage in the clean economy. The biggest risk to climate action is the uncertainty this creates, which will damage investor confidence and distract governments from driving green ambition.
But a more unpredictable US could create opportunities for the UK and EU to attract low-carbon investment and gain a competitive edge in the energy transition. Continued efforts to provide public support for decarbonisation and seek mutual gains with cooperative trade partners will enable Europe to capitalise on the growing demand for renewable technologies globally.
Trade policy may have become a geopolitical game, but the urgent need to deliver a safe climate remains as critical as ever. The world is currently stuck in crisis response mode, but it is vital that we do not lose sight of the long-term direction of travel.
Eileen Torres Morales
Research associate
Stockholm Environment Institute
The effects of Trump’s tariffs on the global transition to green iron and steelmaking are still uncertain. It will take some time to see the impact, if any, such as increased steel prices in the short term, changed trade dynamics or long-term impacts on global green steel production.
The announcement of steel tariffs has forced exporting countries to rapidly reconsider how to stay competitive in the US market. The tariffs might benefit steel producers in the US, but a likely outcome is that both public and private consumers within the US will face rising steel prices regardless of whether the steel is green or not.
Trump’s administration’s interest in research and development of US-based green iron and steel production also remains unclear. It is not yet known if incentives for steel decarbonisation considered in the IRA will remain. For example, will the negotiations to advance green iron and steel production under the US Department of Energy’s industrial demonstrations programme continue or not?
Although the imposition of tariffs by the US may temporarily shift attention away from international competition and policies focused on heavy industry transition, this should not distract from progress in establishing a market for low-carbon products.
Policy instruments, such as the EU’s emissions trading system (ETS) and CBAM, should continue to be prioritised. Such tools can support the construction of a strong internal market for green steel, thus steering attention away from tariffs, back to driving innovation in low-carbon technology and emissions reductions that contribute to global climate action.
Dr Aurélien Saussay
Assistant professor at the Grantham Research Institute on Climate Change and the Environment
London School of Economics and Political Science
The looming threat of Trump’s tariffs is already reshaping energy policy decisions in concerning ways.
Perhaps most alarming, from a European standpoint, is European Commission president Ursula von der Leyen’s recent suggestion that Europe should increase its imports of US shale gas-derived LNG to appease the Trump administration and avoid tariffs. This move would seriously undermine the EU’s 2050 net-zero commitment.
This potential shift illustrates how trade tensions can indirectly sabotage climate progress. I’m particularly concerned by how these tariffs could undermine the viability of carbon-pricing schemes in major economies. When faced with increased economic pressures from tariffs, countries could be more tempted to relax environmental standards to maintain competitiveness.
The steel and aluminium sectors – already struggling to decarbonise – would be especially vulnerable. Many mills have begun investing in cleaner technologies, but tariffs could force them to prioritise cost-cutting over emissions reduction.
Furthermore, the uncertainty created by trade wars makes low-carbon investments riskier. Clean energy technologies, many of which are capital intensive, require stable policy environments to attract investments. The constant threat of retaliatory tariffs dampens investor confidence.
Perhaps most importantly, retaliatory tariffs on clean-energy technologies could significantly slow the global energy transition. This is particularly the case for tariffs targeting China, which is a leader in many of the key decarbonisation technologies. By increasing costs for solar panels, wind turbines and electric vehicles, these measures would hamper deployment rates precisely when acceleration is needed.
The post Experts: What do Trump’s tariffs mean for global climate action? appeared first on Carbon Brief.
Experts: What do Trump’s tariffs mean for global climate action?
This summer has seen Europe suffer through a series of record-breaking heatwaves.
Amid widespread media coverage of the number of deaths and the influence of climate change, the UK’s Daily Telegraph reported on new research with the incorrect headline: “Heatwaves caused by fall in pollution.”
The article was shared on social media by Richard Tice – deputy leader of the hard-right, climate-sceptic Reform UK party – along with a number of prominent rightwing commentators.
Tice claimed that “net stupid zero is contributing to rising temperatures, not helping”, adding that “we have been gaslit and lied to”.
GB News followed up with its own article, incorrectly headlined: “Britain’s scorching heatwaves caused by falling pollution levels, researchers find.”
Scientists tell Carbon Brief that the framing of heatwaves being “caused” by declining air pollution is “wrong”.
While a drop in pollution has reduced the cooling impact it has had in the past, the scientists say, Europe’s summer heatwaves are primarily becoming more extreme “as a result of greenhouse-gas-induced warming”.
Another scientist adds that “any attempt” to link this research to net-zero policies is “simply wrong”.
Fast warming
The extensive reporting around Europe’s heatwaves in recent months has often mentioned that Europe is the world’s fastest-warming continent.
The new study in question aims to unpack why Europe’s summer temperatures are rising more quickly than other regions of the northern hemisphere’s mid and high latitudes.
The research – published in Geophysical Research Letters – explores the role of air pollution and, specifically, how it affects circulation patterns in the atmosphere.
(The study focuses on long-term trends in European summers and does not include the very recent heatwaves.)
Human-caused emissions of aerosols – tiny, light‑scattering particles produced mainly by burning fossil fuels – have long acted to “mask” global warming. This is largely because they absorb or reflect incoming sunlight and influence the formation and brightness of clouds.
To understand how the climate of Europe – or any region – is changing, scientists need to take into account a whole range of factors, says Prof Bjørn Samset, a research professor at Norway’s Center for International Climate Research (CICERO), who was not involved in the work.
This includes “greenhouse gases, aerosols, land-use change, natural variability and how they all interact”, he says, adding:
“The effects of air pollution on circulation, which is the topic here, has long been difficult to pin down.”
As European countries improved their air quality through the second half of the 20th century, the cooling effect of aerosols has gradually been removed.
This can boost heatwaves in two ways – directly, by letting more sunlight reach the land surface and, indirectly, by influencing the jet stream.
Using hundreds of simulations from nine climate models, the new study finds that a decline in aerosols is resulting in more frequent “quasi-stationary Rossby waves”.
Rossby waves are huge meanders in the jet stream. Occasionally, they become slow-moving – or “quasi-stationary” – which allows weather systems to get stuck over one region, leading to prolonged heatwaves.
These circulation changes have contributed to Europe’s rapidly warming summers.
However, while Europe’s heatwaves are being influenced by declining aerosols, it is “wrong” to say they are being “caused” by them, says Prof Erich Fischer, a climate scientist at ETH Zurich.
Fischer, who was not involved in the study, tells Carbon Brief:
“Heatwaves are caused by high-pressure systems and are now much more frequent and intense because they are happening in a climate that is much warmer than 100 years ago as a result of greenhouse-gas-induced warming.
“The paper shows that the greenhouse-gas-induced summer warming had been temporarily masked by air-polluting aerosols. The full extent for European summers only becomes visible now as the air-polluting aerosols have declined.”
Samset adds:
“Air pollution never causes or removes global warming, it only temporarily moderates it.”
Study lead author Dr Pedro Roldán‐Gómez, an associate researcher at the Barcelona Supercomputer Centre, is quoted in the Daily Telegraph saying that “most” of the “excess warming” in Europe, beyond that of comparable regions in the northern hemisphere, can be linked to declining aerosols.
But, earlier in the article, the newspaper interprets this as, simply, “most of the extra heat experienced in Britain and Europe” is down to air pollution.
GB News uses a similar phrasing, reporting that “much of the additional warming across Britain and western Europe since the 1980s is linked to the sharp decline in airborne particles known as aerosols”.
This is “misleading”, says Fischer, while Roldan-Gomez tells Carbon Brief that this is a “tricky point”, which “could lead to wrong interpretations if not properly explained”. He adds:
“The contribution of greenhouse gases is, in any case, the most important factor.”
Cleaner air
The Daily Telegraph’s article was seized upon by Reform’s Richard Tice to claim that “cleaner air” was causing higher temperatures, rather than CO2.
This continued his position – refuted by long-established climate science – that CO2 does not drive global warming.
Tice also claimed in his post that net-zero policies are “contributing to rising temperatures”. Tice appears to be linking declining air pollution to a shift from fossil fuels to renewable energy.
Samset points out that net-zero became a goal “decades later” than the cumulative efforts to reduce air pollution since the 1980s and that it is “simply wrong” to link it to the study.
“The scientific community will keep working to understand how greenhouse gas warming and air pollution interact,” he says, but “nothing we do will change the fact that the consequences of global warming are due to human-induced CO2 emissions”.
Fischer adds:
“Let us not forget that cleaning up air-polluting aerosols is highly desirable. According to the World Health Organisation, 7 million people still die prematurely every year due to air pollution.”
Clean air legislation
Finally, the Daily Telegraph article and the study itself both attribute Europe’s declining air pollution from the 1980s onwards to the Montreal Protocol.
This is a “glaring error”, Samset says, and it is “surprising that it wasn’t picked up” in the peer-review process for the study. He explains:
“The Montreal Protocol did not deal with air pollution. It dealt with ozone-depleting gases and has been an extremely successful multi-national effort against environmental damage. “
Clean air legislation was already in place in many European countries by the time the Montreal Protocol was signed in 1987, says Samset.
In response, Roldán‐Gómez says that while the protocol did not target aerosols specifically, it “boosted the clean air policies”.
The post Factcheck: No, Europe’s heatwaves are not being ‘caused’ by declining air pollution appeared first on Carbon Brief.
Factcheck: No, Europe’s heatwaves are not being ‘caused’ by declining air pollution
Empowering women through greater access to finance could “strengthen” households’ resilience to “climate shocks”, according to a new study.
Published in Climate Risk Management, it analyses the impact of financial access on “women-headed households” in sub-Saharan Africa.
The study finds that where women had formal financial access – such as through owning a bank account – households were more able to withstand short-term shocks.
It adds that “climate shocks”, such as extreme weather events and the impacts of climate change, can cause economic crises, which destabilise communities and households.
However, the authors say that in order to protect households from long-term climate vulnerabilities – including “droughts, floods and sea-level rise” – financial access would need to be paired with wider efforts to tackle gender inequality.
They add that the findings could have important implications for policy in sub-Saharan Africa, where many countries and households are vulnerable to climate disasters.
Financial inclusion
The study highlights that entrenched gender disparities mean many women still have unequal access to financial services in sub-Saharan Africa
For example, women are still less likely to have their own bank accounts and instead are often dependent on male relatives for access to finance.
The number of women with access to an account in the region had risen to 52% as of 2024, according to data from World Bank Group.
However, as shown in the chart below, the gap between men and women has also increased, rising from just under 5 percentage points in 2011 to 12 in 2024.
Using survey data from Afrobarometer, the new study analyses 25,511 women-headed households across 37 sub-Saharan countries.
The authors use the Organisation for Economic Co-operation and Development’s (OECD) framework to measure “financial inclusion”. This looks at factors such as having a bank account, owning a mobile phone and having internet access.
Francis Anaisie, a co-author on the study, tells Carbon Brief the researchers were motivated by the UN’s sustainable development goals (SDGs). Anaisie, an economist at the University of Cape Coast, Ghana, says the study specifically looked at SDGs five and 13, on gender equality and addressing climate issues. He adds:
“Financial inclusion is one of the key policy tools for empowering women or for empowerment. But as to whether this actually translates into better climate outcomes for women is not known or is limited; this study seeks to address that gap.”
The study finds households with higher levels of financial access for women had higher levels of women’s empowerment, when this is defined as the ability to make choices and have control over economic and social outcomes.
This was checked by cross-comparing financial access against different measures of women’s empowerment, such as financial security, voting rights and connection to communities.
In particular, the study found that “financially included” women had greater political and economic empowerment, such as financial security and voting rights. On some measures of social empowerment, however, the link was weaker – financial access alone was not enough to erase cultural and social barriers to gender equality.
Women and climate change
It has been well documented that women are more vulnerable to the impacts of climate change than men.
Environmental shocks affect women disproportionately due to a range of factors. These include income disparities, higher rates of displacement and unequal access to land.
Financial inequality and barriers to economic resources, such as needing internet access to make digital payments, play a key role in climate vulnerability, says Tracy Kajumba. She is director for the Least Developed Countries initiative for Effective Adaptation and Resilience (LIFE-AR) interim secretariat at the International Institute for Environment and Development (IIED).
Kajumba, who was not involved in the study, explains to Carbon Brief:
“Women are on the front line doing farming, planting, harvesting and these things that are all impacted [by climate change]. If they don’t have the income to invest either in drought-resistant crops or water-saving technologies, it becomes difficult for households to adapt.”
Calculating climate resilience
The new study measures the impact of financial inclusion on women’s empowerment and, in turn, on climate resilience.
It evaluates a household’s ability to withstand and recover from “shocks and stressors” by using a UN Food and Agriculture Organization metric for “resilience index measurement and analysis” (RIMA).
For example, questionnaires are used to gather information about households in certain areas. The data is then used, together with key indicators, to quantify a household’s resilience to food insecurity, climate variability and economic crisis, amongst other risks.
The 25,511 households surveyed across sub-Saharan Africa were found to be relatively resilient overall and had a high capacity to bounce back from climate shocks. However, they had much lower ability to adapt, in order to build protective capacity in advance of extreme events.
In addition, the study finds that women’s financial empowerment had a positive impact on a household’s ability to “absorb” a climate shock, suggesting that financial access is critical for responding to climate change.
Increased empowerment through financial access enables women to make decisions about planting crops, to access credit in emergencies and to buy or sell food at a better price, the study notes.
For example, it says increased financial access and women’s empowerment help households to deal with the immediate consequences of an extreme weather event, such as a drought. This could be through building community mutual-support networks and by enabling access to savings, to keep the household running.
Anaisie says the study shows women’s empowerment has a significant impact on climate resilience. He tells Carbon Brief:
“If we include women in the financial system, in the case of any climate issue they can save, they can be independent, they can rely on investment to absorb these shocks. This empowerment will help them to be more resilient to climate shocks…We can make progress because SDG goals are all about inclusiveness. It’s all about inclusive growth.”
However, the study notes that financial access does not necessarily create long-term change, which would make the household less vulnerable to extreme weather in the first place.
The authors suggest that lasting structural and cultural change is important for bringing about long-term resilience. They say that policies to address gender inequalities would help bring this about.
They say such policies could include gender-sensitive agricultural credit schemes, subsidised climate insurance for women farmers in drought-prone regions, joint land-titling programmes and quotas for women in local climate-adaptation committees.
Such policies would have helped women impacted by recent severe floods in Ghana to protect their savings, Anaisie explains. He tells Carbon Brief:
“Women are engaged in economic activities, especially informal activities. They have resources and money, but when the flood came in, many women lost that. If they had access to insurance, this flood wouldn’t have cost them that much.
“So, if the government comes out with financial initiatives, training, civic education and gender-focused initiatives, leadership training, women will be empowered and this will translate into their resilience with regards to climate change.”
Addressing climate vulnerability in sub-Saharan Africa
The study could have policy implications for sub-Saharan Africa, a region particularly vulnerable to the effects of climate change. The region faces increasingly extreme weather, heatwaves, droughts, wildfires and floods, as well as food scarcity and threats to crops.
The study suggests that policies to address structural and cultural barriers to women’s financial autonomy could be a key way to build climate resilience across the region.
However, it recognises that even where financial access is expanded, gender norms and cultural constraints continue to shape women’s social empowerment. This, in turn, affects their ability to adapt to climate change in the long term.
Ultimately, addressing structural inequalities is needed to minimise climate vulnerability, says Kajumba. She adds that supporting adaptation with financial access can allow households to absorb shocks without falling into poverty – and to rebuild after climate impacts.
Kajumba says that supporting adaptation with women’s financial access can allow households to absorb shocks without falling into poverty – and to rebuild after climate impacts. She adds:
“When they are supported [with] microloans, savings and all that, you will see change in income, change in households, change in health and education for the children as well.”
However, Kajumba notes that structural inequalities still “amplify” women’s vulnerability to climate impacts and make it harder for them to exercise agency and leadership. She adds:
“The tools that are being used are not always favourable for women…When we look at women in leadership and participation, you cannot lead or you cannot participate unless you have some level of income.”
The post Access to finance ‘strengthens climate resilience’ among sub-Saharan women appeared first on Carbon Brief.
Access to finance ‘strengthens climate resilience’ among sub-Saharan women
As 2026 passes its halfway point, the world is watching one of the most rapidly intensifying El Niño events in the modern record take shape in the tropical Pacific.
The developing El Niño is boosting expectations for global temperatures, both this year and next.
El Niño is the warm phase of a recurring climate pattern in the tropical Pacific that releases heat from the ocean into the atmosphere, temporarily raising global temperatures and reshaping rainfall and extreme weather around the world.
Carbon Brief’s “state of the climate” report in April gave 2026 a 19% chance of setting a new global temperature record.
That chance now stands at 35% – a near-doubling in four months – with virtually all of the change driven by ever-stronger El Niño forecasts.
The key findings from the first half of 2026 include:
- The first six months of 2026 were the third-warmest start to a year on record – around 1.4C above pre-industrial levels – behind only 2024 and 2025.
- While the first few months of the year came in as the fourth or fifth warmest, both May and June were the second-warmest ever recorded as El Niño conditions took hold.
- El Niño conditions arrived in April and reached the threshold for a “strong” event by June, when the Niño3.4 index reached 1.6C. Of the 667 model runs Carbon Brief examined, 91% project a peak later this year that is above the strongest El Niño in history.
- The chance that 2026 beats 2024 as the warmest year on record has risen to 35%. Carbon Brief’s central estimate remains that 2026 will be the second-warmest year, at around 1.51C above pre-industrial levels.
- Whether 2026 sets a record will depend on the dataset: the odds range from around two-in-three in NASA and Berkeley Earth data to around two-in-10 in ERA5 and one-in-10 in the JRA-3Q reanalyses.
- June 2026 was western Europe’s hottest June on record, amid a heatwave that set hundreds of individual records. Nearly 9% of the world’s surface saw record June warmth.
- The developing El Niño will have its largest impact on 2027, which Carbon Brief projects to be around 1.7C above pre-industrial levels – this would comfortably set a new record for the warmest year.
- Arctic sea ice has spent 39 days of 2026 so far at, or below, record daily lows following its joint-lowest winter maximum in the satellite era.
Third-warmest start to a year
Carbon Brief analyses records from six different groups that report global surface temperatures: NASA GISTEMP, NOAA GlobalTemp, Hadley/UEA HadCRUT5, Berkeley Earth, Copernicus/ECMWF ERA5 and the JMA JRA-3Q reanalysis.
The first half of 2026 was the third warmest on record in every one of the six datasets, behind only 2024 and 2025. The figure below shows annual temperatures since 1970, along with the 2026 year-to-date average (January-June) for each group.
January 2026 was only the fourth- or fifth-warmest January on record, as lingering weak La Niña conditions suppressed temperatures. Since then, each month has climbed the rankings.
La Niña is the cool phase of the El Niño-Southern Oscillation (ENSO). It typically brings wetter conditions to Australia, Indonesia and equatorial South America and drier conditions to the southern US.
March was second-to-fourth warmest across datasets, April the third and both May and June were the second warmest ever recorded, behind only the corresponding months of 2024.
The chart below shows how June 2026 (thick red line) came in around 0.08C below the June record set in 2024 in the average of the six datasets.
Meanwhile, Copernicus reported that global sea surface temperatures over the ice-free oceans set a new June record.
A record-breaking El Niño
ENSO is the largest source of year-to-year variability in global temperatures.
The most common way to assess the strength of an El Niño or La Niña event is by looking at the sea surface temperature anomaly in the “Niño3.4” region of the tropical Pacific.
El Niño and its sister La Niña occur when temperatures in the tropical Pacific are more than 0.5C (El Niño) or less than 0.5C (La Niña) below normal, where normal is defined by removing the effects of long-term climate change.
The thresholds for defining the strength of an El Niño or La Niña are above/below 1C for “moderate” events, 1.5C for “strong” events and 2C for “very strong” (or “super”) events.
After two years dominated by La Niña conditions, the tropical Pacific flipped decisively in April when the Niño3.4 index crossed the 0.5C El Niño threshold. It subsequently reached 1C in May and hit 1.6C in June, marking one of the fastest onsets in the observational record.
In the first few weeks of July, the index shot above 2C, significantly outpacing the speed at which any prior El Niño events developed.
Forecast models expect even more to come.
An analysis by Carbon Brief of the median of 667 model runs from 14 different modelling groups suggests that sea surface temperatures in theNiño3.4 region could peak at 3.59C between July and December.
More than 91% of runs predict the strongest El Niño event in the modern record. The previous record was set during the event of 2015-16, when temperatures peaked around 2.75C.
This is shown in the chart below, which features a histogram of the likelihood of different possible 2026 El Niño peaks across all the models on the top. The forest plot beneath shows the best estimate and range of outcomes predicted by each individual model.
The median forecast in every one of the 14 models suggests a peak that exceeds the 2C “super” El Niño threshold, with most models peaking in November or December.
Some caution here is warranted, however. Raw model Niño3.4 anomalies are measured against a fixed climatology. Because the entire tropical ocean has warmed due to human-caused greenhouse gas emissions, the models tend to overstate event strength relative to the historical record.
A cleaner comparison uses the relative Niño3.4 index (RONI), which subtracts the average tropical ocean warming.
This relative measure suggests the median forecast peak for El Niño in the latter half of 2026 is 3.1C. The prior record stands at a lower 2.69C, set in 1982-83.
Nevertheless, 77% of model runs still show a new record event occurring. This is shown in the chart below.
In summary, on both indexes, the central expectation is now for the strongest El Niño in the observational record.
Model forecasts made in the spring and early summer have historically shown some bias toward overpredicting event strength. However, forecasts made after the spring are considerably more reliable.
Widespread record warmth and a massive European heatwave
The map below shows the temperature anomaly for the first half of 2026 in the ERA5 dataset, relative to a 1981-2010 baseline period.
It shows how the largest warm anomalies were found across the Arctic – particularly north of Scandinavia and Svalbard – as well as western Europe, the western US, northern Mexico, central Asia, western China, eastern Russia and the Antarctic Peninsula region.
The developing El Niño is clearly visible as a tongue of warm anomalies stretching along the equatorial eastern Pacific. Only a few regions – central Canada, Alaska and parts of the Southern Ocean – saw temperatures below the 1981-2010 average.
Where 2026 ranks against history is even more striking. The map below shows where the period of January-June 2026 ranked among all 87 years in the ERA5 record, which stretches from 1940 to 2026. Grid cells marked in red saw temperatures in the first half of the year that were in the top-five warmest years.
More than 30% of the global surface had a top-five warmest start to the year and 7.1% saw its warmest on record, including much of western Europe, the eastern equatorial Pacific and the seas around Japan.
Not a single grid cell had a top-five coolest start to the year. In June alone, 8.9% of the world’s surface saw record warmth for the month. This is illustrated in the map below, where grid cells marked in red saw temperatures that were in the top-five warmest years and grid cells in blue in the top-five coolest.
The standout regional temperature event was a heatwave that struck Europe in late June.
Western Europe had its hottest June on record, recording an average temperature of 3.05C above the 1991-2020 average and beating the record set only a year earlier, according to Copernicus. A heat dome over 22-30 June broke 10 all-time national heat records and around 400 long-record station records.
France set a new June national record of 44.3C, while the UK broke its June record on three consecutive days, reaching 37.3C. The humid heat drove a death toll estimated in the thousands.
A separate heat dome also brought record June temperatures to parts of North America in late June.
On track to be second warmest, but a real chance at first
Carbon Brief’s updated projection for 2026 as a whole combines the observed January-June temperatures with the latest El Niño forecast. It uses a statistical model trained on the historical relationship between the first half of the year, ENSO conditions and annual temperatures observed over 1950-2025, excluding major volcanic eruption years.
Carbon Brief estimates that 2026 will be around 1.51C above pre-industrial levels, with a 90% range of 1.45C to 1.57C, shown by the yellow dot in the chart below.
This is up from 1.47C in the projection set out in April – and is notably more certain now that half the year has passed.
This central estimate would make 2026 the second-warmest year on record, just below 2024 (1.52C) and ahead of 2023 (1.43C) and 2025 (1.41C).
Carbon Brief’s modelling puts the chance that 2026 beats 2024 as the warmest year on record at 35%, using the average of the six different surface temperature records assessed. It puts the chance that 2026 comes in above 1.5C at around 63%.
If it does, 2026 would be the second calendar year – after 2024 – where warming averaged above 1.5C, in a further sign that the world is rapidly approaching the Paris Agreement’s 1.5C limit.
A single year above 1.5C does not by itself constitute a breach of the goal, which refers to the longer term average temperature of the planet. This is defined as the midpoint of a 20-year period by the Intergovernmental Panel on Climate Change (IPCC).
These likelihood of a record have been climbing rapidly throughout 2026.
Global temperatures so far throughout the year have run well below the record-setting levels of 2024 – around 0.13C cooler over the first six months.
On their own, temperatures observed so far in 2026 would make a new annual record unlikely.
However, rerunning the projection using only the data available at the end of each month since March – including both the year-to-date observations and the El Niño forecast issued that month – shows a shifting picture.
Using March data, 2026 had just a 7% chance of setting a new record. That rose to 16% in April, 24% in May, 27% in June and 35% using the latest data in mid-July.
This is shown in the chart below.
Notably, this rise has little to do with observed temperatures. The year-to-date anomaly has actually drifted slightly down, from 1.41C after March to 1.39C after June.
Observed temperatures and fewer remaining months of the year contributed only around four percentage points of the 28-point rise in the likelihood; the remaining ~84% of the change comes from successive upward revisions to the El Niño forecast for late 2026.
However, whether 2026 ends up becoming the warmest year on record may end up depending on which dataset is used.
Running the same projection gives odds of a 2026 record of around two-in-three for Berkeley Earth (66%) and NASA GISTEMP (65%), but only 35% for HadCRUT5, 24% for NOAA and just 13% and 9% for the ERA5 and JRA-3Q reanalyses, respectively.
This is shown below.
The divergence between projections mostly reflects how exceptional each dataset’s 2024 was.
The reanalysis approaches recorded a particularly warm 2024, leaving 2026 more ground to make up. GISTEMP and Berkeley, on the other hand, project 2026 modestly above their 2024 values.
A repeat of the situation in 2015 where different groups disagreed on record rankings is a real possibility. Headlines in January 2027 may hinge on choices of dataset.
2027 likely to be the warmest year in human history
The biggest climate story of the developing super El Niño may not be 2026 at all.
Global temperatures typically lag in the tropical Pacific by around three months. So, an El Niño event peaking in November and December 2026 will have its largest warming influence on 2027.
We saw this same pattern occur in 1997-98, 2015-16 and 2023-24 – where the year in which the El Niño developed was warm, but the following year was record-smashing.
Carbon Brief has extended its projection into 2027 by using the historical relationship between year-over-year temperature changes and ENSO conditions in the preceding autumn.
This yields a best estimate for 2027 of around 1.71C above pre-industrial levels, with a 90% range of 1.49C to 1.93C. This is shown by a yellow square on the chart below.
That would give 2027 a 92% chance of setting a new global temperature record and a 94% chance of exceeding 1.5C.
Taking 2026 and 2027 together, there is a 93% chance that at least one of the two years sets a new record.
The 2027 estimate is more uncertain than the 2026 one. As with 2026, there are uncertainties in the projection due to unknowns around exactly how strong the El Niño peak proves to be and how quickly it decays.
However, even the low end of the 2027 range would put it among the warmest years on record and the central estimate of 1.71C would exceed 2024 by nearly 0.2C.
If these projections bear out, the 2020s will have delivered new global temperature records in 2023, 2024 and 2027 – and potentially 2026 too – with a number of individual years well above the 1.5C threshold.
The long-term warming trend, driven by human emissions of carbon dioxide and other greenhouse gases, has increased from around 0.18C per decade in the early 2000s to around 0.27C per decade today. El Niño and La Niña play a big role in determining which years along that rising path stand out as records.
Arctic sea ice at record lows
Arctic sea ice has spent much of 2026 in record-low territory.
Following the joint-lowest winter maximum in the satellite record in mid-March, daily extent has set or tied record lows for the date on 39 days so far this year, including extended spells in mid-to-late March and in early-to-mid June.
The most recent record-low days were in early July.
The chart below shows how Arctic sea ice in 2026 (dark red line) has been below the historical range (shaded red).
It also shows how Antarctic sea ice (dark blue), meanwhile, has remained below the 1979-2010 range for almost all of 2026 to date.
As of mid-July, Arctic extent is a bit below the 1979-2010 historical range for the date, though it remains around 0.6m square kilometres (km2) larger than the record low for the date set during 2020’s exceptional summer melt season.
The trajectory over the coming two months will determine whether 2026 challenges 2012’s record September minimum. Early-summer conditions are a poor predictor of the September minimum, which depends heavily on summer weather.
Antarctic sea ice, meanwhile, is currently around 300,000km2 below the historical envelope, but has stayed well clear of the record lows set in 2023 and has not set any new daily records yet this year.
Q&A: Europe’s May and June heatwave deaths – and how they were counted
Guest post: France’s June heatwave caused more than 2,700 heat-related deaths
Guest post: Climate change has caused one-fifth of Pine Island glacier retreat
Media reaction: How climate change intensified Europe’s record-breaking June heat
The post State of the climate: Rapidly developing El Niño raises chance of record-warm 2026 appeared first on Carbon Brief.
State of the climate: Rapidly developing El Niño raises chance of record-warm 2026
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