Transform systems, transform impact
Cities hold 55% of the global population and generate 70% of emissions.
Transforming the systems that shape them cuts emissions while making cities more liveable and resilient.
C40’s programmes and networks help mayors redesign these systems. Through peer-to-peer collaboration, city teams share expertise, test solutions, and deliver proven results faster.
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Commitments by C40 cities to drive ambitious climate results and halve fossil fuel use by 2030.
The think tank helping cities shape urban policy on climate change and public health, foster resilient urban economies and create strong climate narratives.