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

This week

Heating up

NOT FREE FROM HEAT: “Dangerous, record-breaking” heat altered plans for 4 July celebrations across the US this weekend, reported the Associated Press. New York and Boston hit 100F (37.8C) on Thursday, said the newswire. CNBC reported that temperatures of up to 105F (40.5C) are forecast in central and eastern parts of the country, with “daily, monthly and all-time records possible”.

TEMPERATURES SOAR: Heat that hit western Europe last week spread east to “scorch” Germany, Hungary, Romania, Poland and others, said Bloomberg. Red warnings for extreme heat were issued in a number of nations, noted the outlet, adding that the heat “underscores how climate change is transforming summers in the world’s fastest-warming continent”. The Independent said last month was confirmed to be England’s hottest June on record.

HEAT DEATHS: June’s extreme temperatures caused more than 2,000 excess deaths in Spain and France, reported the Guardian. The countries are bracing for further heat that “could bring temperatures of 44C (111F) over the coming days”, said the newspaper. Deaths in France rose almost 30% at the heatwave “peak” on the week of 22 June, according to Le Monde. Last week’s conditions also led to around 480 excess deaths in the Netherlands, reported Reuters.

BOILING: Global ocean temperatures reached record levels for this time of year, reported NBC News, “fuelling fears of more dangerous heatwaves this summer and fanning concerns over the escalating global climate crisis”. Scientists told the Financial Times that this could lead the world towards “uncharted territory”. The newspaper said global average sea surface temperatures reached 20.96C on 21 June, exceeding June records for 2023 and 2024.

Around the world

  • GOAL DROPPED: The World Bank will “abandon” its goal to devote 45% of annual lending resources to climate-related projects, reported Reuters. Carbon Brief explored what it could mean for global climate action.
  • FIVE-YEAR PLAN: China plans to invest more than 20tn yuan ($2.9tn) in “key energy projects and new business models” over the next five years, according to International Energy Net.
  • DRILLING: The Guardian said UK Labour politicians “urged” the likely next prime minister Andy Burnham to ignore “deluded” calls to develop the Rosebank oil field located in the Atlantic north of Scotland.
  • PLASTIC TALKS: Countries and activists feared key issues could be sidelined at “critical” talks on a global treaty to curb plastic pollution in Kenya, said Climate Home News. A treaty could have “important implications” for climate change, reported Carbon Brief in 2024. 
  • CANADA PIPELINE: Canadian prime minister Mark Carney announced plans to build an oil pipeline to supply Asia with up to 1m barrels per day, reported the Financial Times. Earlier this week, Carney called the previous government’s climate plans “expensive” and “divisive”, said CBC News

63

The number of UK newspaper editorials calling for more oil and gas extraction in the North Sea so far in 2026, according to Carbon Brief analysis. 


Latest climate research

  • Including emissions from permafrost thaw raises the likelihood of the Arctic becoming a net-carbon source by more than 50% at 2C of warming | Earth System Dynamics
  • Net-zero scenarios relying less on carbon dioxide removals lead to fewer residual emissions, which offers greater health improvements for “non-white and low-income groups” in particular | Nature Climate Change 
  • Agricultural plots of land in sub-Saharan Africa owned by women face heat impacts 2-2.5 times higher than those owned by men | Nature Sustainability

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

Captured

Wind and solar were the world’s largest source of new energy in 2025

Wind and solar were the world’s largest source of new energy in 2025, according to Carbon Brief analysis of the latest Energy Institute statistical review of world energy. Wind and solar also saw the fastest growth, up by 18% in 2025. Nevertheless, every source of energy – including coal, oil, gas, nuclear and hydro – also reached global all-time highs last year.

Spotlight

Vietnam’s EV surge

Carbon Brief explores the reasons behind soaring electric-vehicle sales in Vietnam.

Motorbikes are a constant fixture on streets across Vietnam. They pollute the air in cities and make crossing the road a feat of endurance.

But, increasingly, people are moving away from petrol-powered vehicles to save money and reduce air pollution.

Sales of electric motorbikes, scooters and mopeds more than doubled in Vietnam last year, according to a recent report from the International Energy Agency (IEA).

This identified that Vietnam has the largest electric vehicle (EV) market in south-east Asia.

Nearly one-in-five of the two-wheeled vehicles sold last year were electric, it noted, in a nation with 102 million people and 77m motorbikes.

This is “particularly impactful” given they are the main mode of transport in Vietnam, said Lam Pham, Asia energy analyst at thinktank Ember. He told Carbon Brief:

“Electrifying road transport is essential for Vietnam to achieve its net-zero target by 2050. Road transport accounted for around 86% of transport-sector emissions in 2022.”

The nation has just 6.8m cars, but this number is also climbing, partly due to EVs, with nearly 40% of new car sales being electric.

An electric sightseeing bus, motorcycles and cars in central Hanoi, Vietnam.
An electric sightseeing bus, motorcycles and cars in central Hanoi, Vietnam. Credit: Andy Soloman / Alamy Stock Photo

This is “above levels seen in most European countries”, noted the IEA. (The UK’s figure is around 30%.)

EV incentives

Fuel costs surged in south-east Asian countries earlier this year after the energy crisis caused by the US-Israel war on Iran.

This “accelerated” discussions from “why use EVs” to “why keep paying more for fuel”, said Dr Tham Nguyen, a lecturer at the Ho Chi Minh City campus of Australia’s Royal Melbourne Institute of Technology (RMIT) University, who has researched Vietnamese public attitudes to EVs.

But the surge is “not driven by fuel prices alone”, noted Pham.

Increased EV sales can also be attributed to a “convergence of affordability, convenience and sustainability”, Nguyen said:

“Vietnamese consumers buy EVs because they see real value with immediate personal benefits, such as cost savings and energy security, alongside long-term environmental gains.”

Government policies have also incentivised sales through registration fee exemptions and tax cuts for EVs.

Another factor is affordable EVs sold by Chinese companies and Vinfast, a Vietnamese manufacturer. The IEA report noted that Vietnam is the only country in south-east Asia with “sizeable” domestic production of accessible EVs.

Vinfast reported a 219% year-on-year increase in orders for electric motorbikes and e-bikes in the first quarter of 2026, but the company has yet to turn a profit.

Pham noted that “growing public awareness of air pollution” has also “dramatically strengthened” public support for EVs.

Future plans

Vietnam’s major cities also have plans to get drivers to go electric or turn to public transport.

The capital city Hanoi announced that it would ban fossil-fuel-powered motorbikes from a central zone this month, but this has been postponed until 2028.

Ho Chi Minh City, the nation’s largest city with more than 9.5 million people, intends to introduce low-emission zones and swap 400,000 petrol-powered motorbikes to electric by 2028.

The city’s green transport plans focus on metro lines, electric buses and e-bikes, explained RMIT associate professor Catherine Earl. She noted that walking and cycling are currently “not popular, accessible or safe for many residents in Ho Chi Minh City’s hot and humid climate”.

Looking ahead, Pham said Vietnam could focus on “purchase subsidies, financing schemes and adequate charging or battery-swapping infrastructure, to ensure lower-income riders, including delivery and ride-hailing drivers, are not negatively affected”.

Watch, read, listen

‘JUST 1%’ OF EMISSIONS: The Guardian debunked arguments that climate actions from smaller countries are “insignificant”.

DRILLING RISKS: Mongabay reported on the possible impacts oil drilling in the Amazon could have on a “little-known reef”.

HEATING UP: The BBC Climate Question podcast discussed the weather pattern El Niño and its links to climate change.

Coming up

Pick of the jobs

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

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The post DeBriefed 3 July 2026: US faces scorching Independence Day | Record ocean temperatures | Vietnam’s EV surge appeared first on Carbon Brief.

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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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    Climate Change

    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.

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

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

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