Later is too late.
We are in a time of unprecedented global challenges—conflicts and economic crises are deepening the already devastating effects of the climate emergency.
But while governments and international organisations struggle to move away from fossil fuels, cities are championing a just transition and a more secure future.
At the UN General Assembly, Summit of the Future and Climate Week NYC, mayors demonstrated that ambitious, inclusive climate action can happen—and cities are leading the way.
Mayors are working together across continents to improve lives by addressing real issues like housing, affordability, public safety, and soaring energy costs. Cities are proving that investing in urban areas accelerates climate action that is fairer, faster, and more impactful.
There is no time to lose. Now is the time for national leaders to work alongside cities to scale up climate action and create a safer, fairer future for all.
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THE LATEST FROM C40
Learn about upcoming and recent C40 events featuring global mayors, climate experts, thought leaders and youth activists.
Discover the creative ways cities are taking climate action to create a safer, healthier future where everyone can thrive.
C40 provides research, analysis, implementation guides and more to support and empower cities to transition towards a green and just economy.