description C40 Cities Overview
C40 Cities is a global network of mayors from the world's largest cities, committed to addressing climate change. They work together to share best practices and implement large-scale urban solutions like low-carbon transport, green building standards, and waste management. Unlike traditional conservation groups, C40 focuses on the ork of city planning and infrastructure to create resilient, sustainable urban environments.
help C40 Cities FAQ
Why is it called C40 if the network has more than 40 cities?
The name reflects the network's earlier history, not a fixed membership limit. It began in 2005 with 18 cities and later expanded into a network of nearly 100 major cities.
Can C40 Cities force a member city to change its climate laws?
No, C40 is a network of mayors rather than a national or supranational government. Member cities adopt policies through their own legal powers while C40 supplies research, technical assistance, shared targets, and peer collaboration.
What kinds of projects do C40 cities work on?
Programs cover high-emission urban systems such as buildings, transport, waste, energy, food, and construction. Examples include zero-emission buses, building-efficiency standards, cleaner air zones, and plans for resilience to extreme heat.
How is C40 different from the Global Covenant of Mayors?
C40 is a selective network centered on major cities and intensive policy collaboration. The Global Covenant of Mayors is a much broader coalition involving thousands of local governments, with C40 participating alongside organizations such as ICLEI.
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