Wasted food – if it were a country – would be the third largest source of greenhouse gas emissions in the world, according to the UN’s Food and Agriculture Organization.
Reducing food waste can help to cut down on these emissions, feed those who are hungry and improve food security.
Food waste experts tell Carbon Brief that “food loss and waste” remains a “major issue”.
There are a range of solutions to tackle the problem, they say, but more action is needed to put such actions in place.
This in-depth Q&A outlines why wasted food causes emissions, why it has become such a big issue and how countries and companies plan to slash waste in the years ahead.
- What is food loss and waste?
- Where does food go after it is wasted?
- Why is food waste a climate issue?
- What are countries doing to reduce food waste?
What is food loss and waste?
Around one-third of all food goes to waste during different steps of the production process – from farm, to truck, to fridge.
Food “loss”, according to the UN Environment Programme’s (UNEP) 2021 food waste index report, is defined as all of the edible parts of food that end up discarded in early parts of the supply chain – for example, vegetables that rot in fields before being picked, crops hit by disease and meat that spoils due to lack of transport refrigeration.
These losses occur before the food reaches supermarkets. Around 15% of food produced globally is lost during harvest or slaughter, a 2021 WWF-UK report found.
Food “waste” refers to the discarding of food and the inedible parts of food that are not consumed by people at a retail, food service or household level. This waste can end up in landfill, compost or animal feed.
The vast majority of food waste goes to landfill. As this food breaks down over time, it generates greenhouse gases, primarily methane. (See: Why is food waste a climate issue?)
The chart below shows that the majority of supply chain and household food loss and waste is considered sufficiently edible.
A 2020 World Bank report said that reducing food loss and waste can “make a profound difference” for multiple challenges – reducing hunger, strengthening economies and protecting the environment.
In addition to avoiding greenhouse gas emissions, shifts and reductions in food loss and waste can “promote environmental co-benefits” for biodiversity along with soil and water health, a recent study noted.
Dr Christian Reynolds, a food loss and waste expert and a reader in food policy at the Centre for Food Policy in City, University of London, says waste is a constant struggle because “everybody’s got to eat and food degrades”. He tells Carbon Brief:
“Food loss and waste is a major issue for us as a civilisation to tackle. But it’s something that we’ve been trying to tackle for a long time.”
The UNEP report estimates that food waste from households, retail and the food service industry amounts to 931m tonnes every year. Of this, 61% comes from households, 26% from food service and 13% from retail.
Where does food go after it is wasted?
The majority of food loss and waste ends up in landfills, where it produces methane. Food is the most common material put into landfill and incineration in the US, according to the US Environmental Protection Agency (EPA).
Incinerating waste results in a lower greenhouse gas impact than allowing it to decompose in a landfill.
Composting food waste also has a smaller environmental impact, resulting in 38-84% fewer emissions compared to landfill, a 2023 Nature study found.
The image below shows the EPA’s “food recovery hierarchy”, an inverted pyramid highlighting the most to least preferred options when dealing with excess food.
The most favourable option is to reduce the amount of extra food produced in the first place. The “last resort” choice is to dispose through landfill or incineration. Composting is the second “least preferred” option.
Dr Dawn King, a senior lecturer in environment and society at Brown University in Rhode Island, says that the main priority for food waste should be, as outlined by the EPA, to “get food to people who are hungry”.
Composting often requires either an organised pickup or a garden to compost at home, she tells Carbon Brief, so it is not always an available option for households.
Individuals can take action on food waste in other ways, but options can be limited, Reynolds says. He tells Carbon Brief:
“For both dietary change and for food loss and waste, there is an individualisation of responsibility to some degree. But, also at the same point, there are some system drivers for this.
“An individual can decide what portion and pack size of something they purchase. However, they can’t decide what portion and pack sizes are on display in the supermarket.”
Why is food waste a climate issue?
Producing food in general – particularly meat and dairy – requires a significant amount of land, water and other resources. It is also often costly to produce.
The global food system from production through to consumption is responsible for around one-third of the world’s annual human-caused emissions.
Greenhouse gases from wasted food account for around half of these emissions, a 2023 study found.
The study said that, in 2017, global food waste resulted in 9.3bn tonnes of CO2-equivalent (GtCO2e) emissions – roughly the same as the total combined emissions of the US and the EU that same year.
As food breaks down in landfill, it generates methane – a potent greenhouse gas. Per unit of mass, methane is 84-86 times stronger than CO2 over 20 years and 28-34 times as powerful over 100 years.
The table below shows a WWF-UK analysis of how different commodities, such as fruit, vegetables and meat, contribute to the global level of food waste.
| Commodity | Volume of waste (million tonnes)³ |
% of total production | Value of waste ($million)⁴ |
|---|---|---|---|
| Fruit & vegetables | 449 | 26% | 160,157 |
| Roots, tubers & oil crops | 261 | 15% | 44,095 |
| Meat & animal products | 153 | 12% | 99,738 |
| Cereals & pulses | 196 | 14% | 56,199 |
| Fish & Seafood | 25 | 44% | – |
| Other | 90 | 6% | 8,930 |
The contribution of different food commodity types to the global volume of food waste (in millions of tonnes), the percentage of total production that goes to waste and the value of this waste (in millions of USD). Source: WWF-UK (2021)
It is not only the methane emissions from rotted food that cause an environmental issue. All of the emissions associated with the production of a piece of food that is wasted – from the land used to grow it to the plastic used to package it – could have been avoided if the food was not produced and left to waste.
Food wasted in later stages of the supply chain – such as after it reaches a supermarket shelf or a consumer’s fridge – leads to even more waste due to the extra resources needed for packaging and transportation. (Food transport is not widely considered to majorly contribute to total food emissions, but some research challenges this assumption.)
The EPA says that 560,000 square kilometres of agricultural land is used to produce US food that is lost or wasted each year – an area the size of California and New York combined. This food would provide enough calories to feed more than 150 million people each year, the EPA adds.
Another issue to consider is the “carbon opportunity cost” of the land used to grow food, especially high-emitting options, such as meat and dairy.
In short, if agricultural land used to grow wasted food was instead restored to forest or wild grasslands, the land would be able to store more carbon, with additional benefits for biodiversity.
So tackling and reducing food loss and waste would reduce emissions from across the supply chain and prevent needless resources being used to produce food that does not end up being eaten.
According to the UN, food loss and waste generates around 8% of all human-caused greenhouse gas emissions each year – around the same as the global tourism industry. This also comes at a time when as many as 783 million people were impacted by hunger in 2022, according to the FAO.
From a climate perspective, the right solutions to waste can help “unlock a fairer, [more] equitable and resilient food system”, says Reynolds.
Reynolds says food waste should be a bigger focus point for governments in their efforts to reduce emissions. He tells Carbon Brief:
“That’s an obvious thing that we could be putting within the NDCs [Nationally Determined Contributions, pledges made by each country under the Paris Agreement] as a piece of policy work to actually highlight food loss and waste reduction as part of the NDCs, and then that would cascade downward.
“There has been some discussion of food loss and waste within the wider climate, but it seems a very obvious pathway that we are not using to our fullest extent.”
What are countries doing to reduce food waste?
Food waste is targeted in a number of different ways through policy, campaigns and individual action.
A global goal to reduce waste forms a key part of the UN’s 12th Sustainable Development Goal (SDG) – a set of targets for countries to help tackle climate change, end poverty, improve health and boost economic growth.
One section of SDG 12 aims to halve per-capita global food waste at the retail and consumer levels, and also reduce food losses in production and supply chains by 2030.
But many countries have yet to tackle the issue head on in their policy plans relating to climate.
According to a report by the climate-action non-governmental organisation WRAP, 21 countries committed to reducing food loss and/or food waste in their NDCs submitted before the COP27 climate summit last year.
Of the 193 countries that submitted NDCs, nine countries specifically committed to reducing food waste and 14 committed to reducing food losses, the report found.
Several other countries including the UK, South Africa and parts of the EU refer to other policy documents that mention food loss and waste reduction, but the report notes these policies are not directly included in the NDCs.
The UK and EU
The UK government relies on voluntary action to reduce food waste. For example, in recent years a number of UK supermarkets have removed “best before” dates from certain products in an effort to reduce waste.
A “best before” date is used to signify when food is at its peak quality. A “use by” date is a stricter rule noting the timeframe by which food is safe to consume.
Removing “best before” dates from fresh products such as apples, bananas and potatoes could help to “prevent 100,000 tonnes of household food waste”, according to a 2022 WRAP report.
However, in terms of official policies, the UK government recently disposed of plans to make food waste reporting mandatory for some businesses. Campaigners criticised the decision and said these measures could have reduced food prices and helped tackle climate change, the Guardian reported.
Reynolds says this decision was a “real shame and a missed opportunity” for the UK government. He tells Carbon Brief:
“Food loss and waste is being measured by many companies already. The majority of the supermarkets already are doing this, it’s just not publicly disclosed. So I think there is already some of this happening, it’s just that a piece of legislation would have levelled the playing field.”
Dr Carrie Bradshaw, a food waste policy expert and lecturer in law at the University of Leeds, adds that mandatory reporting is a “necessary, but not sufficient, measure to tackle food waste”.
Measures are also taking place in certain EU countries and on a wider scale across the bloc.
The European Commission has proposed setting targets for EU countries to reduce food waste by 10% in processing and manufacturing, and by 30% at retail and household level by 2030.
In France, supermarkets are legally required to donate unsold food instead of letting it go to waste. A similar law exists in Italy.
Bradshaw says there are many “economic, social and environmental implications of food waste”. She tells Carbon Brief:
“Arguably in seeking to tackle food waste, we should be aiming not at absolute reductions…but reducing the broader climate and other environmental impacts of food waste.
“Distributing the costs of food waste reduction fairly across the supply chain remains a real challenge for food waste reduction, and is why measures which take a joined-up, whole supply chain approach are likely to be important. This in turn is a limitation of the more targeted efforts you see in France, China or South Korea.”
The US
Food waste remains a growing problem. In the US, food waste grew by almost 5% between 2016 and 2021.
Research suggests that as much as half of all US food produced is left to rot, fed to livestock or put from field to landfill due to “cosmetic standards”, the Guardian reported.
The US department of agriculture advises a number of ways for farmers to reduce food loss and waste – including partnering with food delivery box services or donating food.
At the end of last year, Congress approved the Food Donation Improvement Act which “expands liability protections for the donation of food and grocery products”. A group of US lawmakers also recently proposed federal legislation aimed to halve food waste by 2030.
On a state level, some states offer tax breaks to farmers and businesses who donate food rather than letting it go to waste. Others are diverting food waste away from landfill.
Certain restaurants, cafés, supermarkets and stadiums in New York City are required to separate food scraps and other organic waste.
Since a composting law took effect in California at the start of 2022, every jurisdiction in the state has been required to provide organic waste collection services for households and businesses.
But there has been “uneven progress” on the goal to redirect food waste away from landfill since the “groundbreaking” law was implemented, the Los Angeles Times reports.
King says that a lot of food waste is “preventable”, but she believes there is a lack of incentive for many farmers to avoid it. In some cases, it is not “economically efficient” for farmers to sell slightly imperfect fruits and vegetables, King adds.
China
A Nature study published in 2021 estimated that about 27% – or 349m tonnes – of food went to waste each year from 2014-18 in China.
In 2020, the Chinese government announced the “clean plate campaign” as a measure to tackle food waste and raise public awareness on food security.
Sally Qiu, a research associate at the Center on Global Energy Policy at Columbia University, says this campaign, and an anti-food waste law implemented in 2021, form part of China’s wider focus on food waste.
The anti-food waste law is a “code of conduct for different entities – like government, companies, schools, catering services – to improve their food procurement management process”, Qiu tells Carbon Brief.
She notes that the “clean plate campaign” appears to be “coming from a food security standpoint, rather than a climate crisis standpoint”. She adds:
“One of the side effects is that reducing food waste is good for the climate.”
Qiu says there has not been a substantial evaluation of progress so far on the success of these initiatives. She says:
“It is a very well-intended campaign. They don’t want people to waste things. But, just based on what I have seen so far, it’s more of an ideal rather than a very substantial achievement [in] reducing a lot of food waste.”
China’s action plan to hit peak emissions by 2030 sets out a goal to “put a resolute stop to wasteful behaviours, and work tirelessly to reduce food waste in the catering industry”. Qiu describes this goal as a “turning point” of the Chinese government making the “connection with food waste and climate change”.
Qiu says the campaign and law are a “good start”, but more tangible targets may have a bigger impact. She tells Carbon Brief:
“These laws and initiatives are more like they’re encouraging people to do certain things. But it didn’t really say what the goal [is]. Peaking carbon has a very clear goal of 2030…I think maybe for food waste, they can come back with more empirical research…Maybe they can set a more quantitative target, an evidence-based target.”
The post In-depth Q&A: What food waste means for climate change appeared first on Carbon Brief.
Last month, COP31 president-designate Murat Kurum launched a target for 35% of the world’s final energy to come from electricity by 2035.
In an interview with Carbon Brief, Kurum says that the target was not a political choice, but instead reflects the latest evidence on “what is needed to keep 1.5C within reach”.
The ongoing Hormuz crisis means there is an “urgent” need for renewables and electrification, which are the “surest and cleanest way to protect citizens” from high energy prices.
Kurum says that the Brazilian and Ethiopian presidencies of COP30 and COP32, as well as the EU, UK and Canada, have welcomed the target.
He adds that “all have confirmed it will be central to discussions at COP31”.
In the interview, Kurum – who is also Turkey’s minister of environment, urbanisation and climate change – tells Carbon Brief where the target came from and what he expects to happen next.
Carbon Brief: You recently launched a target for 35% of the world’s final energy to come from electricity by 2035. Where did this idea come from?
Murat Kurum: The “35 by 35” target is grounded in technical data and based on the IEA [International Energy Agency] and IRENA [International Renewable Energy Agency] analysis of what is needed to keep [the 1.5C Paris Agreement target] within reach. The level was not chosen politically. Rather, it reflects what the science and the energy modelling tell us is required.
CB: Why do you think an electrification target is important right now?
MK: The case for the target is urgent right now. The latest war in the Gulf has made energy diversification – and, in particular, renewable energy transition and electrification – a top global priority, because it is the surest and cleanest way to protect citizens around the world from high and volatile energy prices.
At a time of real fragmentation in international relations, a single, shared target is needed to focus global efforts by aligning governments, businesses and investors behind a common benchmark and to send a clear market signal.
CB: Which countries are supporting this target so far?
MK: The reaction so far has been extremely positive and, while we presented our target at the UN June climate meetings in Bonn, our earlier conversations with parties at both the Petersberg and Copenhagen climate dialogues paved the way for this launch.
For example, the EU, UK, and Canada have welcomed the target, as have the Brazilian COP30 and Ethiopian COP32 presidencies. All have confirmed it will be central to discussions at COP31.
This support has been reflected in the business community as well, with polling by the We Mean Business Coalition showing that 90% of businesses expect to have largely electrified their operations by 2035 and that 88% expect electrification will make their business more competitive.
CB: How do you hope and expect to see this taken forward at the COP? Could it be in the formal COP outcomes, or part of the second global stocktake?
MK: We are now taking electrification forward as an “action agenda” initiative to bring actors together and drive progress. The action agenda and the [formal COP] negotiations are separate, but complementary, with different processes and thresholds, and it is too early to say what all countries might be able to agree in the negotiations. That is for parties to determine as the year progresses.
We are focused and determined to use COP31 as a moment to spark a global conversation about electrification.
CB: What are the key priorities for reaching the target?
MK: The critical sectors for reaching the target are buildings, transport and industry, which together account for around 45% of global emissions. Financial support for the developing world and investment in grids and infrastructure is also crucial.
The target also builds on COP28’s target to triple renewable energy capacity and seeks to take advantage of the tumbling cost of renewable power and other technologies critical to the energy transition. This is a journey that Turkey itself is taking ambitious steps on, including our plan to reach 120GW [gigawatts] of renewable capacity by 2035.
This interview was first published in the 10 July 2026 edition of Carbon Brief’s DeBriefed weekly newsletter. Sign up for free.
The post Interview: COP31 president says electrification is ‘surest way to protect citizens’ appeared first on Carbon Brief.
Interview: COP31 president says electrification is ‘surest way to protect citizens’
Climate Change
DeBriefed 10 July 2026: Deadly Europe heat | EU electrification leak | COP31 president interview
Welcome to Carbon Brief’s DeBriefed.
An essential guide to the week’s key developments relating to climate change.
This week
‘Catastrophic’ climate impacts
RECORD HEAT: Western Europe experienced its hottest June on record – some 3C above average – according to analysis covered by the Guardian. It said the finding came “as the UK enters its third heatwave of the year and wildfires ravage France and Spain”. Le Monde said 10,000 people had been evacuated due to wildfires in southern France.
‘EXCESS DEATHS’: The June heatwave killed more than 2,700 people in France, according to a guest post analysis for Carbon Brief. Similar analysis for Germany said there had been more than 5,000 “excess deaths”, reported Bloomberg. Meanwhile, an ongoing heatwave in the US has killed at least 30 people, said USA Today.
STORM TEST: Floods have killed 39 people in Guangxi province in southern China, said state-run newspaper China Daily. Scientists warned that climate change and the weather phenomenon El Niño are exposing China to “catastrophic storms” that will test its resilience in 2026, reported Reuters. The nation’s latest official climate report found that “extreme weather and climate events…have become more frequent and severe”, said China National Radio.
Around the world
- EU ELECTRIFICATION: The European Commission is set to unveil a 2040 target for EU electrification on 17 July, reported Bloomberg. Citing a leaked draft, it said the plan would aim to cut oil use in half and gas use by two-thirds.
- PEAKING PLAN: China has published an “action plan” for peaking emissions during the 15th five-year plan period to 2030, reported Xinhua. It lists targets including “new energy vehicles” making up 30% of cars on the road by 2030, said Reuters.
- CLIMATE ‘FLAT EARTHER’: The Trump administration has appointed Matthew Wielicki, described by Politico as a “climate critic”, to lead the office in charge of the US national climate assessment. Common Dreams quoted a scientist describing the move as “like putting a flat-earther in charge of NASA”.
- UGANDAN SUIT: A group of farmers from Uganda have launched a legal suit in London against the East African oil pipeline, according to Climate Home News.
23%
The share of Irish electricity used by data centres in 2025, reported the Irish Times.
2%
The share of global electricity used by data centres in the same year, according to Carbon Brief analysis of the Energy Institute statistical review.
Latest climate research
- Meltwater from the western Himalayan glaciers will peak at around 2C of warming, before declining at higher warming levels | Environmental Research Letters
- Current coral restoration efforts may be unsuitable for temperate reefs, including those in the Mediterranean | Nature Ecology & Evolution
- People tend to underestimate the level of “broad public support” for climate action | Nature Climate Change
(For more, see Carbon Brief’s in-depth daily summaries of the top climate news stories on Monday, Tuesday, Wednesday, Thursday and Friday.)
Captured
Carbon Brief explained – via eight facts – why air conditioning rates in some parts of Europe are relatively low, as the technology emerges as a new front in the global “culture war” over climate action. Analysis for the article illustrated that, in many parts of the world’s fastest-warming continent, air conditioning simply was not needed in the past.
Spotlight
COP31 president speaks to Carbon Brief on electrification
This week, Carbon Brief interviews Murat Kurum, president-designate of the COP31 UN climate talks in November and Turkey’s minister of environment, urbanisation and climate change, on his target to boost global electrification.
Carbon Brief: You recently launched a target for 35% of the world’s final energy to come from electricity by 2035. Where did this idea come from?
Murat Kurum: The “35 by 35” target is grounded in technical data and based on the IEA [International Energy Agency] and IRENA [International Renewable Energy Agency] analysis of what is needed to keep [the 1.5C Paris Agreement target] within reach. The level was not chosen politically. Rather, it reflects what the science and the energy modelling tell us is required.
CB: Why do you think an electrification target is important right now?
MK: The case for the target is urgent right now. The latest war in the Gulf has made energy diversification – and, in particular, renewable energy transition and electrification – a top global priority, because it is the surest and cleanest way to protect citizens around the world from high and volatile energy prices.
At a time of real fragmentation in international relations, a single, shared target is needed to focus global efforts by aligning governments, businesses and investors behind a common benchmark and to send a clear market signal.
CB: Which countries are supporting this target so far?
MK: The reaction so far has been extremely positive and, while we presented our target at the UN June climate meetings in Bonn, our earlier conversations with parties at both the Petersberg and Copenhagen climate dialogues paved the way for this launch.
For example, the EU, UK, and Canada have welcomed the target, as have the Brazilian COP30 and Ethiopian COP32 presidencies. All have confirmed it will be central to discussions at COP31.
This support has been reflected in the business community as well, with polling by the We Mean Business Coalition showing that 90% of businesses expect to have largely electrified their operations by 2035 and that 88% expect electrification will make their business more competitive.
CB: How do you hope and expect to see this taken forward at the COP? Could it be in the formal COP outcomes, or part of the second global stocktake?
MK: We are now taking electrification forward as an “action agenda” initiative to bring actors together and drive progress. The action agenda and the [formal COP] negotiations are separate, but complementary, with different processes and thresholds, and it is too early to say what all countries might be able to agree in the negotiations. That is for parties to determine as the year progresses.
We are focused and determined to use COP31 as a moment to spark a global conversation about electrification.
CB: What are the key priorities for reaching the target?
MK: The critical sectors for reaching the target are buildings, transport and industry, which together account for around 45% of global emissions. Financial support for the developing world and investment in grids and infrastructure is also crucial.
The target also builds on COP28’s target to triple renewable energy capacity and seeks to take advantage of the tumbling cost of renewable power and other technologies critical to the energy transition. This is a journey that Turkey itself is taking ambitious steps on, including our plan to reach 120GW [gigawatts] of renewable capacity by 2035.
Watch, read, listen
HEATED: A Financial Times long read asked if Europe – the world’s fastest-warming continent – is “prepared for a world of extreme heat”.
LITIGATED: The Outrage and Optimism podcast spoke to Prof Joana Setzer and Catherine Higham about the latest trends in climate litigation.
‘SHATTERED’: Confidence in fossil-fuel exports via the strait of Hormuz has been “shattered”, wrote IEA chief Fatih Birol for Foreign Policy.
Coming up
- 13-17 July: Meeting of open-ended working group on the Montreal Protocol, Bangkok, Thailand
- 13-24 July: International Seabed Authority Council, Kingston, Jamaica
- 16 July: International Energy Agency critical minerals outlook 2026, online
Pick of the jobs
- Wellcome Trust, head of policy – climate and health | Salary: £84,640-£105,800. Location: London
- Financial Times, senior reporter, Sustainable Views | Salary: Unknown. Location: London
- North Texas Public Broadcasting, climate, energy and environment reporter | Salary: $70,000-$78,000. Location: Fort Worth, Texas
- Energy & Climate Intelligence Unit, head of communications and engagement | Salary: £65,000-£70,000. Location: London
DeBriefed is edited by Daisy Dunne. Please send any tips or feedback to debriefed@carbonbrief.org.
This is an online version of Carbon Brief’s weekly DeBriefed email newsletter. Subscribe for free here.
The post DeBriefed 10 July 2026: Deadly Europe heat | EU electrification leak | COP31 president interview appeared first on Carbon Brief.
DeBriefed 10 July 2026: Deadly Europe heat | EU electrification leak | COP31 president interview
As successive heatwaves hit Europe, air-conditioning (AC) has emerged as a new front in the international “culture war” over climate action.
France, Germany and the UK have experienced record-breaking heat and thousands of heat-related deaths this summer, with June temperatures in many regions passing 40C.
This has drawn attention to the relatively low rates of AC use in these countries – and in Europe as a whole – especially when compared to its widespread adoption in the US.
Legacy newspapers, bloggers and even Elon Musk have all weighed in on “European hostility” to AC, criticising Europe’s “cultural conservatism” and “overbearing governments”.
Right-wing politicians, including National Rally in France and the UK Conservatives, have styled themselves as champions of AC, while opposing efforts to tackle climate change.
Missing from most of these interventions is the fact that human-caused climate change has made once-rare heat far more common, in what is the world’s fastest warming continent.
Carbon Brief analysis for this article shows that, until the 2020s, it was rare for many European cities to see days above 30C, making AC an unnecessary expense.
Here, Carbon Brief explains – via eight facts – why AC rates in some parts of Europe are relatively low, as well as clarifies and contextualises some of the misleading claims circulating about the technology.
- Much of Europe has not needed AC in the past
- AC is already widely used in hotter parts of Europe
- Some European nations have ‘resisted’ AC – but its popularity is growing
- AC emissions are growing, but its climate impact could be limited
- Heat from AC can contribute to directly warming cities
- More AC could help to reduce heat deaths in Europe
- ‘Net-zero rules’ are not blocking AC installation in the UK
- AC is not the only answer to overheating cities
Much of Europe has not needed AC in the past
AC installation rates in northern parts of Europe are very low. The best available estimates suggest that 6% of households in Germany and just 4% in England use AC.
However, these rates are largely explained by the historical climates in these nations.
Unlike the US, much of the housing stock and infrastructure in Europe was built at a time when AC did not exist and was not necessary.
Moreover, nations such as France, Germany and the UK have only started to regularly experience extreme heat in recent decades.
The chart below shows the average number of days per year, in each decade since the 1950s, when maximum temperatures have exceeded 30C in major European cities. Capitals such as London and Paris have seen a significant jump since around 2000.
Prof Jan Rosenow, an energy and climate researcher at the University of Oxford, tells Carbon Brief:
“For most of the 20th century, northern Europe simply didn’t need cooling. Homes in Britain and Germany were built to keep heat in, not out, because winters were cold and summers rarely hot.”
Much of the commentary about the relatively low rates of European AC use focuses on cultural or “ideological” factors. (See: Some European nations have ‘resisted’ AC – but its popularity is growing.)
However, Rosenow says people’s views on AC in these countries likely stem from their historically colder climates. He adds:
“Attitudes formed around those facts, not the other way round…There is a cultural element, but it is the product of climate, not of some green ideological project.”
In the past, many in Europe relied on traditional methods to keep buildings cool. Richard Black, head of communications at Climate Analytics, made this point in a post on LinkedIn:
“Once, residents of cities such as Paris could cope with summer heatwaves by opening shutters and windows during the night, and closing them again in the morning to trap the cool air inside…We’ve reached a limit to this sort of adaptation.”
Now, with Europe around 2.5C warmer than pre-industrial levels, climate change is routinely driving record-breaking heatwaves, even in the north of the continent.
This is forcing a reappraisal of societies that were “built for a climate that no longer exists”, as the UK’s Climate Change Committee (CCC) put it in a recent report.
Experts broadly agree that much of Europe will indeed need more AC, particularly in spaces housing the most vulnerable populations, such as care homes, schools and hospitals.
At the same time, they also emphasise broader, “passive” efforts to make cities and homes cooler alongside increased AC use. (See: AC is not the only answer to overheating cities.)
AC is already widely used in hotter parts of Europe
During periods of extreme heat, articles criticising “European hostility” towards the technology frequently note that “only about 20%” of households in Europe have AC.
Often, this is contrasted with the US, where more than 90% of households have AC installed. (In fact, the US is something of a global outlier, matched only by Japan.)
However, the continent-wide figure for Europe obscures the reality. In southern Europe – where temperatures are and have always been higher – AC is relatively common.
The map below, based on official EU data, shows that southern European nations use far more household energy for “space cooling” than those in the north.
Government figures show that nearly 60% of Italian households have AC. Household-level data in many countries is patchy, but various analyses have placed that figure at 70-80% in Greece and 41% in Spain – with higher penetration in the hotter, southern part of the country.
The same pattern can be seen within France. International coverage has stressed the country’s “cultural resistance to AC”, citing a nationwide figure from 2020 that suggests “only” 25% of French households have AC.
However, polling data from customers of the Hello Watt energy app suggests that there is a distinct north-south divide in French uptake. At least 60% of households in Mediterranean regions of France are equipped with AC, according to these figures.
This can be seen in the map below, with households across northern regions, including Paris, reporting far lower AC installation rates, often below 5%.
Finally, when making such comparisons to Europe, it is worth noting that high rates of AC use reported for the entire US also obscure significant differences between – and within – US states. This, too, aligns with differences in regional climate.
Hotter states in the US south have near-universal AC access. But in Washington, a north-western state with a climate more comparable to that of western Europe, 66% of people have AC in their homes.
Some European nations have ‘resisted’ AC – but its popularity is growing
International commentators have written extensively about Europe’s “longstanding resistance to cooling technology”, especially when compared to the US.
Newspaper editorials in the Washington Post and the Wall Street Journal, alongside numerous op-eds and blog posts, have added fuel to this “culture war”. Elon Musk has even promoted an AI-generated message stating that Europeans “should just install AC”.
Often, European attitudes are attributed to “guilt” about AC’s energy demand, “cultural conservatism” or “overbearing governments”. One commentator ascribed divergent attitudes in Europe and the US to “different ideas about physical suffering and sacrifice”.
Meanwhile, right-leaning commentators and climate-sceptic groups have blamed “climate policies, which view AC as an unnecessary luxury”.
In general, these critiques often fail to consider the most obvious explanation, which is that AC adoption is low in northern Europe because the historical climate made AC unnecessary.
Critical articles have instead drawn attention to restrictions on AC use in some European countries, as well as the lack of support for AC in official heatwave guidance.
For France, in particular, polling has indeed highlighted widespread disapproval of AC, both on environmental grounds and due to alleged health impacts. Such messages have also been voiced regularly in French media and by left-leaning and green politicians.
However, across Europe there are plenty of signs that such attitudes are shifting, following successive spells of extreme heat.
Amid the June heatwave, there were reports from Germany, France and the UK of “skyrocketing” AC sales. This surge was even acknowledged by the foreign ministry in China, due to the nation’s role in supplying many of these products.
The shift is taking place in politics as well. Marine Tondelier, leader of the French Green party – which has traditionally opposed AC – recently stated that “there are places where we just can’t do without AC anymore”.
Overall, AC has been on the rise across Europe, with France, Spain and the Netherlands all using more than twice as much energy for AC and other “space cooling” technologies in 2024 as they did in 2015.
AC production in Germany has also risen by at least 75% in recent years and a growing share of German homes are being built with it installed.
Notably, there is little evidence that “climate policies” are blocking Europeans from installing AC. Polling in Germany shows that, while people are concerned about environmental impacts, the high costs of installing and running it are perceived as greater barriers.
Finally, there is an important distinction between individual AC units in people’s homes and installing them in public spaces, such as hospitals, care homes and schools.
While neither is widespread in France, support for the latter can increasingly be found across the political spectrum, from Greens to the far-right National Rally (RN).
AC emissions are growing, but its climate impact could be limited
Some people have noted that a wider rollout of AC in Europe could drive up emissions.
As noted in the Financial Times by columnist and chief data reporter John Burn-Murdoch, there is a logic to this argument, “at least superficially”. He writes:
“AC uses a lot of energy; if the proposed defence against emissions-driven global warming means emitting more, then we have an obvious problem.”
The emissions impact of AC depends heavily on the generation mix of a country’s power sector.
According to the International Energy Agency (IEA), “space cooling” – mostly AC, but this does include some fans – used 2,100 terawatt-hours (TWh) of power globally in 2022.
As such, it was responsible for 1bn tonnes of carbon dioxide (CO2) from electricity use globally. This equates to around 2.7% of total CO2 emissions globally from fossil fuels and industry.
(As well as indirect emissions through power use, AC units can also directly release greenhouse gases – used as AC refrigerants – when they leak or are improperly disposed of. Following the 2016 Kigali Amendment, countries are progressively trying to phase down the use of potent greenhouse gases in AC units.)
In a LinkedIn post, Lauri Myllyvirta, lead analyst at the Centre for Research on Energy and Clean Air and regular Carbon Brief contributor, says:
“There is a lot of alarmist messaging about how much electricity AC uses. However, on an annual basis, the demand is not that substantial. Currently, AC uses about 1% of electricity in the EU and catching up to adoption rates in the US would double this.”
According to the IEA estimates from 2018, “if left unchecked, energy demand from AC will more than triple by 2050”, reaching 6,200TWh of power.
By mid-century, households would contribute the most to the increase (70%), with at least two-thirds of the world’s households potentially having AC, according to the Paris-based agency.
Decarbonising electricity grids and energy-efficiency improvements can reduce AC emissions and their impact on climate.
For instance, in countries with a low-carbon electricity mix – such as France, where nuclear energy accounts for 67% of its electricity generation – expanding AC would have a more limited climate impact than in other countries.
In countries such as India, there could be a more significant increase in emissions as AC is adopted, due to the role coal plays in the country’s energy mix, especially during the night. Demand is growing fast – following low access historically – and many AC units are inefficient, with high electricity use.
According to a new working paper from the India Energy and Climate Center (IECC) at the University of California, Berkeley, “room AC” – portable plug-in units, as opposed to those permanently installed in buildings – already accounts for nearly one-quarter of India’s peak electricity demand (60-70GW) – and this is before the majority of Indian households have bought their first AC unit.
Dr Nikit Abhyankar, co-faculty director of the IECC, tells Carbon Brief that, as AC use is expanded across the world, it should be paired with solar and battery storage, where the “economics have completely shifted” in the last few years. This will help to cut both energy bills and emissions.
According to the IEA, accelerating energy efficiency improvements could deliver more than one-third of all CO2 emission reductions between now and 2030.
The global energy demand needed to run ACs alone in 2050 could be reduced by 1,300GW – the equivalent of all of China and India’s coal plants – through energy efficiency measures, it estimates.
Aditya Valiathan Pillai, a climate adaptation researcher at King’s College London, tells Carbon Brief that, as the use of AC expands, there is a conversation to be had about where and “what type of technology [is used] and who gets access” to it.
A final point is that many AC units are air-to-air heat pumps, which can efficiently heat homes, as well as keeping them cool. As such, wider AC adoption could boost the adoption of electrified heat, helping to cut emissions from gas boilers.
Heat from AC can contribute to directly warming cities
Some critics of AC mention its electricity demands and associated CO2 emissions from fossil-fuel combustion, which contribute to raising the temperature of the entire planet. (See: AC emissions are growing, but its climate impact could be limited.)
But AC also has a localised impact. It works by removing heat from indoor air and pushing it outdoors, raising temperatures on the street and exacerbating the “urban heat island” effect.
Left-leaning French politicians are among those citing this as an argument against AC, particularly in cities. Indeed, Emmanuel Grégoire, the Socialist mayor of Paris, appeared to be making this point in an interview with Le Monde, during the June heatwave:
“[AC] can be useful for cooling collective spaces and protecting the most vulnerable populations, but individual AC is a scourge – it makes the problem worse by heating the city even more.”
One study concludes that, in a city such as Phoenix, Arizona, where the technology is widespread, AC use during a heatwave can raise night-time temperatures by 1-1.5C.
Another models a nine-day heatwave in Paris – in a future with “massive” AC use – and finds an increase in external temperature of more than 2C, due to heat emitted by the units.
Given this, some scientists argue that AC can be a form of climate “maladaptation” – referring to actions that backfire and make people more vulnerable to global warming.
The Intergovernmental Panel on Climate Change (IPCC) has highlighted this issue, concluding:
“AC may constitute a maladaptation because of its high demands on energy and associated heat emissions, especially in high-density cities.”
Compared to the US, more people in Europe live in dense, urban areas. According to Dr Vincent Viguié, a climate change economist at École des Ponts ParisTech, this could leave Europeans more exposed to heat from AC units. He tells Carbon Brief:
“If you live in a neighbourhood that is not dense, like in a suburban neighbourhood or in the countryside, you don’t care about this…So, once again, there is a key difference between US and European cities.”
Viguié is among the experts arguing that other climate-adaptation measures should be considered alongside AC, to keep entire cities cool – not just individual homes. He says:
“It’s not to say that the heat released by AC by itself is a reason to forbid AC…It’s just that not taking that into account may lead to bad decisions.”
More AC could help to reduce heat deaths in Europe
Heatwaves can be deadly, especially for older or vulnerable members of society.
According to climate scientists at World Weather Attribution, “heatwaves cause more deaths in Europe than all other natural hazards combined”.
The heatwave in June 2026 is estimated to have killed more than 20,000 people in Europe. In France – which has seen some of the hottest temperatures – the heatwave caused more than 2,700 heat-related deaths, according to analysis published by Carbon Brief.
AC does help to protect people from the effects of extreme heat. A 2021 study found that globally, AC averted an estimated 190,000 heat-related deaths annually during 2019-21.
With its much higher penetration of AC, the US has fewer deaths due to extreme heat than Europe.
Heat kills around 11 people out of every 100,000 in Europe, compared to around two people in the US, according to analysis by data scientist Dr Hannah Ritchie from Our World in Data.
Several publications have pointed out that “Europe’s heatwaves are deadlier than American gun violence”. While this is technically accurate in absolute terms, Ritchie says the comparison is “a bit silly” for a number of reasons, not least because on a per-capita basis, US gun deaths are higher.
However, experts suggest that AC is only one part of a wider effort to protect people from extreme heat.
A 2020 study looking at heat-related mortality in Canada, Japan, Spain and the US, found that excess deaths due to heat decreased between 1972 and 2009.
For example, the proportion of deaths due to extreme heat fell from 1.7% to 0.5% over the period in the US and 3.5% to 2.8% in Spain.
However, an increase in AC only explained 16.7% of the drop in the US and 14.3% in Spain.
The research concludes that “other factors have played an equal or more important role in increasing the resilience of populations”. This is supported by research that shows changes to cities, such as planting more trees, as well as behavioural shifts and public-health measures, can all protect people from dangerous heat.
Additionally, across Europe there is already a range of policies and measures in place to protect the most vulnerable from heatwaves. Many of these were brought in following the unprecedented summer of 2003, when 70,000 died from extreme heat.
These policies were highlighted by French environment minister Agnès Pannier-Runacher, in response to the far-right National Rally (RN) party’s AC proposals:
“The incompetent RN has just found out that nursing homes need air-conditioned rooms. Thank you, but it’s actually been mandatory since 2004.”
Another study found that measures that have already been rolled out in France would cut the projected death toll of a 2003-like heatwave by more than 75%. This is in part due to the expansion of AC in places such as nursing homes, but also other approaches, such as heat action plans.
For example, France has a multi-tiered action plan, which includes local governments ensuring access to cooled spaces and water, keeping a list of vulnerable individuals for targeted interventions, as well as national information campaigns.
According to the UN’s office for disaster risk reduction, this French plan has led to a “significant reduction in heat-related mortality”.
While action plans have proved successful in a number of nations, less than half of European countries have such a plan in place.
‘Net-zero rules’ are not blocking AC installation in the UK
In the UK, Conservative politicians and right-leaning media have tried to pit the adoption of AC against net-zero policy.
Writing in the climate-sceptic Daily Telegraph, columnist Matthew Lynn claimed falsely:
“Strict net-zero rules now mean that aircon is effectively banned in the UK.”
(Further down the article, he concedes: “AC is not strictly speaking banned in new-build homes in the UK. But tough environmental rules mean that it is very hard, and expensive, to install in practice.”)
The same narrative has been used in articles by GB News, the Sun and others. A separate article in the Daily Telegraph’s “money” section goes further, claiming that AC had been “torn from homes under net-zero clampdown”.
A blog post from the Ministry of Housing, Communities and Local Government rebuts these claims, stating:
“There has been media coverage this week suggesting that AC is banned in homes. This is incorrect.”
For the UK, while it is true that fewer than 5% of homes currently have AC, this is largely due to the fact that it was not hot enough in the past to warrant the expense. Historically, the focus has therefore been on keeping buildings warm, rather than cool.
Extreme heat has previously been rare in the country, so homes were built with insulation and other measures to keep heat in during the “dank winters”. (See: Much of Europe has not needed AC in the past.)
Current regulations do not ban the installation of AC outright. However – as the government’s blog post notes – there is no blanket rule, meaning there are some localised differences.
Certain areas – or certain kinds of properties – may be subject to additional complications for installing AC.
In a 2025 video on Instagram, shadow secretary of state for energy security and net-zero Claire Coutinho referenced the London plan, for example, which is a framework for development in the capital launched in 2021. She said:
“[London mayor] Sadiq Khan says no. The London plan says we shouldn’t have air con because it uses too much energy. But this is mad! This is a poverty mindset that we need to get away from.”
The London Plan does not stop homes from having AC. It simply says that, for new buildings, passive design measures should be prioritised, such as the orientation of the building, the window design and incorporation of measures such as external shading and trees.
A recent response from the mayor added further measures, such as the need to “minimise the necessity for the operation of mechanical measures including AC, which would further add to the heat island effect within urban areas and add operational cost to residents”.
Elsewhere, new-build homes across England must meet the requirements of “part O” of the 2022 building regulation updates. This includes addressing overheating in buildings through energy-efficient design and prioritising passive cooling, with AC as a last resort.
For existing buildings, most AC units fall under “permitted development rights”, meaning no planning application is required to install them.
Additionally, regulations were relaxed in 2025 to make it easier to install an air-to-air heat pump – which can both heat and cool air – without planning permission.
This means that, far from blocking the expansion of AC, net-zero policy has made it easier to install specific cooling systems.
Speaking to Carbon Brief, Andrew Sissons, director of sustainable future at Nesta, says the government must now implement its announced £2,500 subsidy for air-to-air heat pumps “as quickly as possible”, to further ensure that the technology can be rolled out efficiently. He adds:
“[The government] should also continue to expand permitted development rights for air-to-air heat pumps, with a particular focus on flats and homes in denser areas. As long as heat pumps meet the MCS [Microgeneration Certification Scheme] noise test, there are few reasons to limit their use via the planning system.”
Some properties, such as large homes, listed buildings or those in conservation areas, may still require planning permission to install an air-to-air heat pump or other AC. Sissons notes that this can add cost and delay to installation.
While it cannot be said that AC has been blocked or banned due to net-zero, neither has it been prioritised.
This may shift as temperatures continue to rise. UK government advisors at the Climate Change Committee (CCC) suggest that 22% of the UK’s housing stock will likely need active cooling, such as AC, to cope with 2C of global warming.
The CCC’s recent adaptation report also calls for all new homes to be built using low-cost, passive cooling measures, alongside more AC.
Active cooling such as AC is more likely to be needed for retrofitting existing homes, the report adds.
AC is not the only answer to overheating cities
AC has become increasingly politicised in Europe, as demonstrated by France’s RN party announcing its “grand plan for AC” in all public buildings.
As noted by Dutch MEP Gerben-Jan Gerbrandy, this “far-right” embrace of AC is coming from the same people who for years have “delayed emissions reductions”.
In response, left-leaning policymakers in Europe have frequently downplayed the role of AC, prioritising programmes of urban greening and retrofitting older buildings.
Such approaches for dealing with extreme heat have already proved successful. Therefore, many experts argue that these methods, alongside AC, will be essential to prepare for a hotter world.
According to the IPCC’s sixth assessment report, adaptive infrastructure, such as urban forests and green roofs, can reduce energy use because of cooling, with co-benefits for climate, air quality, physical and mental health.
While retrofitting older buildings for heat as well as insulating them from the cold might prove challenging, urban greening and an active shade policy – one that determines how much of every street is exposed to direct sunlight – are simple measures cities can adopt.
Some experts have also warned about the high cost of running AC, expressing concerns that excessive reliance on the technology could increase energy poverty.
In a Carbon Brief guest post published in 2025, researchers at the Basque Centre for Climate Change found that framing AC as the “default solution” can miss the opportunity to design “more inclusive, human-centred responses” to rising temperatures.
William Lewis, a PhD candidate and one of the guest post’s authors, tells Carbon Brief it is not a case of “one or the other”, when considering AC and other options:
“We have this opportunity in European countries to choose a slightly different path [from the US], which isn’t AC in every single home.”
King’s College London’s Pillai says that, by centring the debate on AC, the far-right response to the heatwaves in Europe has “completely neglected the science of how you cool human beings”.
There are many solutions, he adds, that are already widely used across hot developing countries, such as ceiling fans, windows that open and cross-ventilation, as well as strategies to reduce cumulative hours of heat exposure.
Pillai tells Carbon Brief that, while places reaching 42C and higher “definitely need to think about AC very seriously”, places in the “low to mid 30Cs” could rely on these alternatives.
Behavioural change, he adds, is the “least glamorous part” of heat policy, but “pulls most of the weight” of protecting people. These include a wide range of actions and responses – from reducing heat exposure, to wearing lighter clothing and drinking more water and fluids.
There are also workplace protections. Pillai tells Carbon Brief that these could include legislation on mandatory work breaks, cooling and shade requirements at workplaces, as well as health insurance that covers heat stress days that have been lost by heat-exposed workers.
The post Eight facts about air conditioning amid an overheated global debate appeared first on Carbon Brief.
Eight facts about air conditioning amid an overheated global debate
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