Local action, global change
The climate action cities achieve locally is shaping what the world commits to globally.
Cities are already delivering cleaner air, resilient neighbourhoods, and fairer economic opportunities. With mayors overseeing systems that shape life for more than half of the world’s population, local progress is setting the pace for global ambition
Through C40, mayors are transforming frontline experience into global influence and sharing proven solutions on a global stage. They’re pushing for stronger climate commitments, direct access to finance, and defending climate science against disinformation.
Almost all C40 cities now have Paris-aligned climate plans, and many are cutting emissions faster than their national governments. This track record gives mayors the credibility to shape the global agenda at forums like UN climate conferences, turning promises into concrete outcomes for people and planet.
Explore how cities are scaling global change
Cities are delivering climate action that creates employment, improves health, and addresses inequality rather than leaving people behind.
C40 ensures mayors have a voice at COP, G20, and other forums where decisions are made that affect cities’ ability to deliver climate action.
How C40 helps cities access climate finance to shape greener, healthier and more resilient cities.
How C40 helps cities collaborate with businesses to accelerate climate action and create local opportunities.
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Where global mayors, climate experts, and youth activists unite to accelerate urban climate action.
