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C40 Cities is a global network of nearly 100 of the world’s leading cities - together representing about 920 million people and 23% of the global economy - united by their commitment to urgent and ambitious urban climate action. Through collaboration across cities, C40 helps turn climate ambition into concrete results: using sector‑specific programmes, innovation accelerators, data‑driven research, financing pathways and advocacy to reduce emissions, increase resilience, and foster equitable, sustainable urban communities.