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@c40cities

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A global network of nearly 100 world-leading cities that are #UnitedInAction to confront the climate crisis and create a future where everyone can thrive.

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Joined August 2010
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@c40cities
C40 Cities
13 hours
Africa is responsible for less than 4% of global emissions but is disproportionately affected by climate breakdown. The time to act is now. Next week, city leaders will convene at the UrbanShift Africa Forum in Nairobi and share how they are scaling up climate action in cities.
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@c40cities
C40 Cities
15 hours
(2/2) Clean air action delivers major public health benefits, increases residents' wellbeing, and spurs economic growth. See what cities are doing to improve air quality and public health in our 2024 Clean Air Accelerator progress report.
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@c40cities
C40 Cities
15 hours
RT @MarkWatts_: Heat and humidity are making it harder for economies to function, but cities are stepping up. Great to speak to @AttractaM
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@c40cities
C40 Cities
2 days
The number of cities exposed to extreme heat will nearly triple by 2050. To help cities assess extreme heat risks, we're excited to join the #IBMSustainabilityAccelerator. Together, we will create a data-driven, AI-powered solution to help keep people safe.
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@c40cities
C40 Cities
3 days
200 million people in 350 cities experience summer temperatures over 35°C (95°F). Extreme heat has a high economic cost with losses projected to rise to $2.4 trillion by 2030. At the #AfricanUrbanHeatSummit, we called for scaled solutions to mitigate these challenges.
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@c40cities
C40 Cities
10 days
A greener construction sector will benefit the environment, create millions of jobs & help ease the housing crisis in #London. “I’m proud that London is leading the way in the green transition of the construction sector…”, - @MayorofLondon @SadiqKhan ➡️
@MayorofLondon
Mayor of London, Sadiq Khan
10 days
New research from @C40Cities makes it clear: by investing in initiatives like the Green Skills Academy and fast-tracking building upgrades, we’re not just cutting carbon emissions—we’re creating jobs and making sure every Londoner has access to new opportunities.
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@c40cities
C40 Cities
13 days
We welcome the UK’s new national climate plan. C40 looks forward to working with the UK and other international climate leaders to deliver ambitious and inclusive national climate plans that keep equity and justice at the forefront. Cities, devolved administrations and national governments working together is the best way to deliver strong emission reduction targets, and secure the goals of the Paris Agreement - this is the essence of the CHAMP pledge which the UK has endorsed.
@BusinessGreen
BusinessGreen
14 days
Paris Agreement: UK formally submits NDC climate targets for 2035
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@c40cities
C40 Cities
14 days
RT @MarkWatts_: Airport expansion just makes meeting urgent climate targets harder. Great to see @SadiqKhan's leadership on this issue.
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@c40cities
C40 Cities
14 days
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@c40cities
C40 Cities
15 days
The greener the construction sector, the greater the socio-economic benefits, C40 Cities’ latest research shows. From increased job opportunities to more homes being built, inclusive growth in cities means everyone's quality of life improves. Read more:
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@c40cities
C40 Cities
20 days
By prioritising housing rights, sustainability & social welfare, cities like Barcelona are fighting back against the rising tide of the far-right, tech billionaires and disinformation, Mayor @JaumeCollboni tells @eldiarioes.
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@c40cities
C40 Cities
20 days
Take a look at our Climate Ins and see how Amsterdam, London and Rotterdam have already taken action in 2025. 👉 (2/2)
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@c40cities
C40 Cities
20 days
RT @ChicagosMayor: While the federal government turns its back on the planet, Chicago stands firm in its commitment to safeguard the health…
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@c40cities
C40 Cities
21 days
Congratulations to Ambassador André Corrêa do Lago on being appointed as the president of COP30. Under President @Lula’s leadership, #COP30 promises to be a pivotal moment for bold climate action. C40, cities and our mayors will continue to push for more decisive commitments and a clear path for cities to lead the just transition to a sustainable future. We look forward to working with Ambassador André Corrêa do Lago.
@LulaOficial
Lula
23 days
A COP30, que acontece este ano em Belém, terá como presidente André Corrêa do Lago, atual Secretário de Clima, Energia e Meio Ambiente do @ItamaratyGovBr, e como diretora executiva (CEO), Ana Toni, que atualmente é Secretária Nacional de Mudança do Clima do @mmeioambiente. Sejam bem-vindos! Faremos uma COP30 histórica por um futuro mais justo e sustentável para o nosso planeta. 📸 @ricardostuckert
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@c40cities
C40 Cities
21 days
Federal inaction will not derail climate action and progress. Where Trump is letting the world down, @MikeBloomberg , @BloombergDotOrg and others are stepping up to ensure the US meets its international climate obligations despite Trump’s withdrawal from the Paris Agreement. 👏
@Reuters
Reuters
21 days
Former New York Mayor Michael Bloomberg's philanthropy and other US funders said they will cover US financial obligations to the UN climate framework after Donald Trump called for the US to withdraw - for a second time - from the Paris climate agreement
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@c40cities
C40 Cities
22 days
Trump's withdrawal of the US from the Paris Climate Agreement is strengthening the resolve of cities worldwide to deliver action that moves us towards the targets that nearly 200 countries agreed to 10 years ago. Together, cities will tackle the existential threat posed by climate change. The Mayor of Paris, @Anne_Hidalgo and the @MayorofSeattle Bruce Harrell join their counterparts worldwide in reaffirming their commitments to creating a safe future.
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@c40cities
C40 Cities
22 days
Together, we can defeat the politics of fear and division, with hope, unity and practical policies - as London and many other C40 Cities have done. Read @MayorofLondon's article here:
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