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C40 Cities @c40cities
Joined August 2010
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11,150 Photos and videos
As cities face rising temperatures, the need for action has never been greater. Kicking off #WCS2026, C40 mayors discussed how nature-based solutions can help build cooler, more resilient cities, and what it takes to scale them from pilot projects to key urban infrastructure.
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5 myths about data centres debunked ⬇️ 🧵
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4⃣ Misconception: We need oil and gas to power data centres otherwise they won’t be reliable Reality: Clean energy can reliably power data centres through renewable generation and power purchase agreements that decarbonise the grid.
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5⃣ Misconception: Data centres create significant local employment Reality: Most jobs are temporary, but cities like Dublin are changing this by introducing data centre training into local schools and creating direct hiring pipelines into the industry.
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5 cities prioritising electric charging ⚡ As many drivers make the transition to electric vehicles, cities play a key role in implementing charging infrastructure.
An illustration of a bustling, colourful city street filled with diverse people, an electric car at a charging station, a delivery truck, an e-scooter, and a cyclist. Text reads: "The way we power our cities is changing. 5 cities prioritising charging for electric taxis, ride-hail, and deliveries. Artwork by Erin Dwia."

ALT An illustration of a bustling, colourful city street filled with diverse people, an electric car at a charging station, a delivery truck, an e-scooter, and a cyclist. Text reads: "The way we power our cities is changing. 5 cities prioritising charging for electric taxis, ride-hail, and deliveries. Artwork by Erin Dwia."

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By making sure chargers are available in every community, cities support businesses, incentivise those who drive the most, and create cleaner, healthier transport systems.
A photo of a beachside cityscape in Rio de Janeiro, overlaid with a graphic of a pink hand holding an electric vehicle charging plug. Text details Rio's launch of fast-charging hubs and plans for expansion.

ALT A photo of a beachside cityscape in Rio de Janeiro, overlaid with a graphic of a pink hand holding an electric vehicle charging plug. Text details Rio's launch of fast-charging hubs and plans for expansion.

An evening photo overlooking the Portland city skyline with mountains in the background, overlaid with a graphic of a delivery person riding a blue electric scooter. Text explains Portland's focus on priority charging areas for ride-hail drivers.

ALT An evening photo overlooking the Portland city skyline with mountains in the background, overlaid with a graphic of a delivery person riding a blue electric scooter. Text explains Portland's focus on priority charging areas for ride-hail drivers.

An aerial photo of a Mexico City street, overlaid with a graphic of a white electric car connected to a lightning bolt symbol. Text outlines the city's programme to help taxi drivers switch to clean energy.

ALT An aerial photo of a Mexico City street, overlaid with a graphic of a white electric car connected to a lightning bolt symbol. Text outlines the city's programme to help taxi drivers switch to clean energy.

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Read more in our new report: c40knowledgehub.org/s/articl…
A daytime photo of modern skyscrapers in London, partially overlaid with a graphic of an EV charging station with a yellow lightning bolt. Text highlights London's pilot model for shared charging facilities among buses, freight, and public fleets.

ALT A daytime photo of modern skyscrapers in London, partially overlaid with a graphic of an EV charging station with a yellow lightning bolt. Text highlights London's pilot model for shared charging facilities among buses, freight, and public fleets.

A photo looking down a New York City street lined with brick apartment buildings and skyscrapers in the distance, overlaid with a large yellow lightning bolt graphic. Text describes NYC's use of spatial analysis to prioritise charging sites in underserved neighbourhoods.

ALT A photo looking down a New York City street lined with brick apartment buildings and skyscrapers in the distance, overlaid with a large yellow lightning bolt graphic. Text describes NYC's use of spatial analysis to prioritise charging sites in underserved neighbourhoods.
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C40 Cities retweeted
Minecraft Education
@PlayCraftLearn
May 29
🏙️Urban planning is coming to Jordan: Minecraft‑style. Through the latest Schools Reinventing Cities challenge, students in Amman are reimagining their communities from the ground up using Minecraft Education. From sustainability to inclusive design, this challenge puts young city‑planners in the driver’s seat, exploring real urban challenges and proposing creative, sustainable solutions. Learn how students are crafting the future of Amman in this article from @C40Cities: 👉 c40reinventingcities.org/en/…
Skyline of Amman, Jordan, recreated in Minecraft

ALT Skyline of Amman, Jordan, recreated in Minecraft

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This week, we're celebrating cities taking action for Global Heat Action Day and @unep's 50 Cities at 50°C campaign. From Freetown to Milan, here's how cities are protecting people from dangerous indoor temperatures ➡️
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🇮🇹Milan converted a schoolyard into a cool gathering space for the community. 🇲🇾Kuala Lumpur added greening and shading, held talks around heat awareness, and opened a dedicated cooling centre for residents.
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🇬🇷Athens is implementing heatwave warnings and constructing green areas with cooling spots 🇦🇷Buenos Aires is planting trees, building green walls and creating shaded gathering spaces. 🇺🇸New York deployed over 20 pop-up cooling stations during the hottest months.
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How are cities responding to the climate crisis every day and protecting residents? New from the Journal of City Climate Policy and Economy, this issue focuses on advancing equity and justice, covering adaptation and resilience in cities. Read here: c40.me/49cfqe5
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Mayors are their communities' frontline protectors. In 2015, @yakisawyerr received a Gold Medal for her work during the Sierra Leone Ebola crisis. This week, she spoke to @bbcworldservice about her experience and how it may help the current outbreak in DR Congo.
Yvonne Aki-Sawyerr OBE
@yakisawyerr
May 19
As the World Health Organization (WHO) declares the Ebola outbreak a Global Health Emergency of International Concern, I was interviewed on BBC Newsday this morning sharing experiences from the 2014-2014 Ebola outbreak in Sierra Leone. #PreventEbola
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A healthy, clean, and sustainable environment is a human right. This UN resolution, adopted by an overwhelming consensus, is a vital and historic step for climate action to be an obligation for governments to protect their residents, not a choice.
António Guterres
@antonioguterres
May 20
I welcome the adoption of the General Assembly resolution on the @CIJ_ICJ's advisory opinion on climate change – a powerful affirmation of international law, climate justice, science & the responsibility of states to protect people from the escalating climate crisis. Those least responsible for climate change are paying the highest price. That injustice must end.
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As the closest level of government to communities, mayors are already leading the charge on inclusive climate action. The climate crisis is a crisis of inequality: climate justice requires social justice. City-led action, rooted in data and science, is critical to achieve both.
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Your phone. Your coffee. Your sneakers. Most of what we use every day arrived by sea. In the Cities 1.5 season finale, David Miller and Eric Garcetti discuss the Los Angeles-Long Beach-Shanghai Green Shipping Corridor and cleaner global trade: lnk.to/S6E10
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