The C40 World Mayors Summit will convene hundreds of mayors, governors, and local leaders on the frontlines of the climate crisis, all committed to placing communities and local priorities at the center of climate action.
Taking place from 3–5 November in Rio de Janeiro, just days before COP30 in Belém, the Summit represents a pivotal moment for city-led climate leadership. It will showcase innovative urban solutions from around the world, demonstrate the power of delivery-focused collaboration, and build momentum toward COP30.
CPI’s Global Managing Director, Barbara Buchner, will moderate a high-level discussion with leading global mayors on how cities are advancing climate finance, engaging investors, and developing innovative funding approaches to strengthen urban resilience and drive a just, sustainable transition.
