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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.

Europe has warmed rapidly since the 1980s

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.

Headline in the Daily Telegraph, 22 July 2026.
Headline in the Daily Telegraph, 22 July 2026.

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.”

Headline on GB News, 23 July 2026.
Headline on GB News, 23 July 2026.

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.

Richard Tice on X on 23 July 2026

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

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Will the world’s drying lands get relief from COP17 in Mongolia?

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Starting on Monday, about 10,000 government negotiators, scientists, journalists and campaigners will gather at a purpose-built venue in a national park in Mongolia’s capital Ulaanbaatar to discuss how to stop land turning into desert as the world warms.

Drought is currently sweeping much of the Northern hemisphere, leaving normally green urban parks looking like dry savannah, causing crops to fail, food prices to rise and billions to be shaved off economic output.

On Wednesday, Britain’s prime minister chaired an emergency meeting of the government’s Cobra committee. These are usually reserved for wars, terrorist attacks, riots and pandemics – but this one was on the extreme heat and drought the UK has been suffering since May. 

With many countries facing far worse with fewer resources than the UK, the issues to be discussed at the UN’s COP17 summit in Mongolia – often overlooked – should be nearer the top of policy-makers minds.

But what is COP17?  What will be decided and announced there over the next two weeks? How does it relate to climate change and how will it help restore the lands on which we all rely for our food, water and other essential resources? Climate Home News explains all below.

What is COP17?

It is the conference of parties (COP) to the United Nations Convention to Combat Desertification (UNCCD). The parties are 196 governments, which includes all of the countries recognised by the UN.

The convention was conceived at the Rio Earth Summit in 1992, at the same time as the other two larger “Rio trio” conventions on climate and biodiversity. 

While the climate convention’s COP takes place every year, the UNCCD COP happens only once every two years. COP17 will be its seventeenth gathering.

Negotiators at COP16 in Riyadh (Photo: IISD/ENB | Anastasia Rodopoulou)

What is desertification?

It is the process by which land degrades and becomes more like a desert, making it harder – and sometimes impossible – to grow crops or graze livestock there.

Climate change and other human activities – like excessive irrigation which depletes ground water – are making this process worse, causing poverty, hunger, health problems, forced migration and loss of species.

It’s a widespread problem. The UN estimates that half a billion people live within areas that have experienced desertification since the 1980s and that two-fifths of the world’s land is degraded.

What has it got to do with climate change?

The planet’s climate is heating up, mainly due to humans burning fossil fuels, and drying out its land. This kills plants and exposes the soil which can then be blown away by wind and washed away by water.

Without a top layer of soil, plants struggle to grow again and the land gets closer to being a desert. So combating desertification is a way of adapting to climate change.

It is also a way of lessening the pace of climate change, as land degradation releases carbon dioxide previously stored in healthy soils and plants.

What will be negotiated at COP17?

The main issue is what form a new initiative to tackle drought could take. The last COP saw Africa push hard for this to be a protocol – a kind of binding sub-treaty to the UNCCD.

But the US, Europe, Argentina and others argued that would take too long to set up, cost too much and take money away from what can be spent on the ground. They prefer a legally weaker alternative – a framework instead of a protocol. 

Negotiations went late into the last night of talks in Riyadh, with the Saudis hosting informal consultations, but eventually governments had to agree to disagree and pick up talks again in Ulaanbaatar. 

As Earth dries out, countries fail to reach drought agreement

Governments will also negotiate a new policy on protecting rangelands and pastoralists from degradation. Rangelands are areas where animals graze. They cover around half the Earth’s land and include almost everything other than forest, deserts, farms, glaciers and cities. Pastoralists are people who herd animals on these rangelands, often moving from place to place to find fresh pasture. 

COP17 host country Mongolia has a lot of both – and pushed successfully for the UN to declare 2026 the International Year of Rangelands and Pastoralists. It is keen to agree a decision at COP17 bringing those issues more to the forefront of the UNCCD.

Negotiators will also debate the UNCCD’s post-2030 strategic framework, which they hope to adopt at COP18 in 2028. Campaign groups like the World Wildlife Fund want a stronger focus on biodiversity and nature-positive food systems.

What will happen when?

The COP will formally open with a ceremony on Monday August 17, followed by opening statements by governments and the adoption of the agenda.

Negotiations will begin, mostly behind closed doors for two weeks until the closing plenaries on Friday August 28.

While talks rumble on in the background, the second week will see senior government representatives including ministers get involved, with a “high-level segment” running from August 24-26.

A delegate at COP16 in Riyadh (Photo: IISD/ENB | Anastasia Rodopoulou)

They will discuss issues like drought resilience, finance and pastoralist communities. This is likely to be when any announcements – of new funding, for instance – are made.

On Monday August 24, there will also be an open dialogue between government officials and civil society members. Here, local practitioners are likely to share stories of how they are helping their communities reverse land degradation. UNCCD prides itself on being a bottom-up convention.

Unlike climate COPs, which often end a day or two over time, UNCCD COPs usually finish on the evening of their last day and – while they have gone late into the night – have never run into the next day.

What else should we watch out for?

At the last COP two years ago, host Saudi Arabia led the creation of an initiative called the Riyadh Global Drought Resilience Partnership to help 80 of the poorest nations deal with drought.

It received $12 billion in pledges, mainly from Gulf-based development finance institutions. Saudi Arabia is expected to report back on whether these pledges have been delivered and how the money will reach those in need now.

There are also hopes that governments will announce financial support for Mongolia’s Rangelands Flagship Initiative, which aims to mobilise investment in projects to fight land degradation.

Who will preside over COP17?

While the last five and the next two climate COPs have been or will be presided over by men, COP17 will be woman-led with Mongolia’s foreign minister, Battsetseg Batmunkh, as president.

Mongolia’s foreign minister and COP17 president Battsetseg Batmunkh (Photo: Uugansukh Byamba)

This will also be the first COP for the UNCCD’s new executive director Yasmin Fouad. Before being appointed environment minister in her native Egypt, Fouad was a scientist and lead author of the Intergovernmental Panel on Climate Change’s special report on desertification. She played a key role at the COP27 climate summit in Egypt in 2022.

Although Saudi Arabia’s UNCCD COP presidency is ending, the Gulf power house will likely continue to be influential. It has supported the COP financially as part of the Riyadh-Ulaanbaatar action agenda and will be following up on initiatives announced two years ago.

While Saudi Arabia is often blamed for obstructing progress at climate talks, as a desert nation it is generally thought to have played a constructive role at UNCCD COPs.

What are the negotiating dynamics?

The UNCCD has six main negotiating groups: Africa, Asia, Latin America and the Caribbean, the Northern Mediterranean, Central and Eastern Europe, and developed donor countries. Governments can also speak in their own capacities.

While divisions between the Global North and Global South do exist at UNCCD COPs, they are not as stark as at climate COPs. The Global South’s umbrella group – the G77 and China – usually only speaks on finance issues, on which developing countries tend to be united.

    Civil society groups are present but not as vocal or as confrontational as at climate COPs. There are generally no protests and campaigners tend to try to hold governments accountable more quietly. There are likely to be far fewer journalists than at climate COPs too.

    What role will the US play?

    While the US has left the UN’s climate convention, it remains in the UNCCD and is expected to bring a delegation of officials from its departments of agriculture and state. It is likely to resist any renewed push from Africa for a drought protocol.

    The post Will the world’s drying lands get relief from COP17 in Mongolia? appeared first on Climate Home News.

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    Pushing the climate crisis: How advertising fuels high-carbon lifestyles

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    Helen Phillips’ book, ‘Hum’, is set in a dystopian near future, in a city suffering the effects of climate breakdown and with dire air quality. Robots (the Hums) press advertising messages during conversations, meetings and even as they carry out medical procedures.

    The Hums are vehicles for these ad messages, which are often for products like cosmetics, sweets or anything that might be relevant during interactions with humans. This advertising is poorly disguised, and merges with sentiments that lean towards concerns of well-being, convincing people how much better off they’ll be if they make a purchase.

    While the novel is futuristic, the insidious way advertising permeates daily life is resonant of how adverts show up in our world today. And these ads are directly contributing to the worsening future climate Phillips describes in her book.

      Already by the summer of 2026, Europe had seen a 57% increase in wildfires in just four years with western Europe recording the hottest ever June and July on record. We’re facing droughts and floods, as well as predicted hikes in food costs or even chronic food shortages – and that’s before the expected additional effects of a strong El Niño later this year.

      Frequent flying and bigger burgers

      A portion of this climate breakdown is fuelled by over-consumption in richer countries, particularly of products that are high carbon – for which advertising can take some of the blame. Research shows that adverts drive citizens to consume about a third more goods and services in general, over and above what they might have purchased.

      Yet despite a clear link between promoting high-carbon behaviours and climate breakdown, little advertising regulation exists in the UK. Take frequent flying for instance, one of the most carbon-intensive activities we can partake in.

      EasyJet’s latest ad campaign is called “Drop Everything”. It encourages consumers to book cheap flights departing within the next 48 hours for presumably short or weekend getaways. Rather than promoting a specific destination, “Drop Everything” promotes a mindset that encourages indiscriminate consumption of flying. The ads were shown on billboards with clever creative slogans, as well as on digital media and through influencer campaigns.

      Overall, flight numbers are increasing. The UK Civil Aviation Authority reported the highest number of UK passengers in the first quarter of 2026 (more than 61 million, breaking previous records for travel between January and March). It seems we’re still not joining the dots between flying and a worsening climate.

      And how about meat consumption? Scientists advocate for less meat-eating, especially beef which has the highest carbon footprint of nearly all foods. Yet adverts from McDonald’s proliferate, helping make it one of the highest-volume sellers of fast-food chain beef burgers. In 2024, the outdoor advertising budget for McDonald’s UK rose to £86 million, an increase of 71% on previous years.

      A billboard carrying McDonald’s UK advertising for one of its biggest burgers, which won “Badvert” of the month in May 2026 (Photo: Badvertising)

      A billboard carrying McDonald’s UK advertising for one of its biggest burgers, which won “Badvert” of the month in May 2026 (Photo: Badvertising)

      Small share for sustainability

      While over half of UK ad professionals feel increasingly queasy about their profession and its effects on the climate crisis, the people running the show – the UK trade bodies – prefer to focus on the growth advertising brings.

      In the first three months of 2026, they stated that UK advertising spend increased by 9.3%, reaching a total of £11.7 billion for that quarter, fuelling consumption and market growth.

      But how many of those adverts actually promote low carbon goods and services? Kantar’s Sustainable Ads Tracker shows the percentage of ads featuring sustainability messaging in 2026 is around 4.3%. That’s woefully low, and much of this is made up of messaging that promotes recycling.

      PR firm working for Shell wins COP30 media contract

      Additionally, the ad industry continues to happily produce adverts for the large oil and gas corporations that are fuelling climate breakdown. These adverts only narrowly pass the Advertising Standards Authorities’ advertising codes, allowing the continued greenwashing of the world’s most polluting brands.

      There is essentially no leadership from the UK trade bodies, likely because they are directly funded by the brands and advertisers themselves. They are essentially ‘ad shushing’ – pushing for indiscriminate growth and directing attention to their sustainability awards, while confusingly denying that adverts drive higher consumption overall.

      Let’s ‘un-shush’

      Where does this leave us as we are subjected to hundreds, if not thousands, of persuasive advertising messages every day that support high-carbon lifestyles? Most ad professionals are unable to push back against this agenda at work, often due to the threat of job loss. The advertising trade bodies won’t take the lead as they work in service to big brands and advertisers.

      NGOs urge Brazil to prevent fossil fuel capture of COP30 climate summit

      So, who can push for the changes we need? Members of the public.

      Through pressuring our city officials and governments, we can force through restrictions, such as the watershed bans on unhealthy foods on TV before 9pm in the UK. Through supporting the efforts of organisations such as Ad Free Cities and others, we can help achieve bans on outdoor advertising for fossil fuels, aviation, meat and even single-use plastics in cities and regions such as Amsterdam, The Hague, Edinburgh, Florence, Uppsala and many more.

      If we’re serious about climate change and stopping big global brands pushing their high-carbon products onto us, then advertising restrictions are one of the best ways to achieve this. If we don’t want a world like the one Phillips describes in her book, we need to make our voices heard above the advertising noise.

      The post Pushing the climate crisis: How advertising fuels high-carbon lifestyles appeared first on Climate Home News.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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