C40 is a global network of cities committed to addressing the climate crisis, supporting member cities in reducing emissions and promoting green projects for a 1.5°C limit.
C40 is a global network of nearly 100 mayors from the world's leading cities, united in their commitment to address the climate crisis. The network was established in 2005 and has grown to include cities that make up over 22% of the global economy. C40 supports its member cities in reducing greenhouse gas emissions and climate risks through various initiatives, including the development of climate action plans, high-impact accelerators, and global and regional programs. The network also facilitates access to finance for green projects and promotes the creation of good, green jobs. The goal of C40 is to help limit global heating to 1.5°C and build healthy, equitable, and resilient communities. Member cities are committed to using an inclusive, science-based, and collaborative approach to cut their emissions in half by 2030. C40 provides a platform for cities to share best practices, collaborate on climate action, and advocate for international policies that support their efforts.