Cities get the job done
Deadline 2020
Deadline 2020 is a commitment from the world’s leading cities to urgently pursue high ambition climate action, demonstrating how we can deliver on the Paris Agreement. Now is the time to act!
Learn More
Tech Challenge
Are you a woman working on an innovative tech solution for the climate? Apply now for this exciting international contest and see your idea come to life in one of C40's cities!
Learn More
Cities around the world are building a brighter future
Cities are leading the world by making ambitious commitments to deliver climate action in line with Paris Agreement targets. In the run-up to the Global Climate Action Summit, C40 is announcing bold commitments on Net Zero Carbon Buildings, Advancing Towards Zero Waste, and new signatories to the Green & Healthy Streets Declaration.
Learn MoreNEW REPORT: Consumption based GHG emissions of C40 cities
New research by C40 Cities, the University of Leeds, University of New South Wales, and Arup examines the greenhouse gas (GHG) emissions associated with goods and services consumed by residents of cities such as food, clothing, electronic equipment, airplane travel, delivery trucks and construction industries. The findings reveal a detailed picture of the supply chains and sphere of impact that mayors, businesses and citizens can potentially influence with their climate action.
Learn MoreCities4Climate: The Future is Us | Livestream
Across the world, from Paris to Durban and Hong Kong to Los Angeles, city leaders are taking bold and ambitious climate action to shape the cities of the future. Hear from global mayors, business leaders, and other changemakers leading the way toward healthier and more sustainable cities.
Learn MoreNEW REPORT: The Future We Don’t Want
New research from C40 Cities, Global Covenant of Mayors for Climate & Energy, the Urban Climate Change Research Network and Acclimatise predicts how many urban residents will face potentially devastating heat waves, flooding and droughts by 2050 if global warming continues on its current trajectory.
Learn More