Explore our cities
C40 has 96 member cities
Making up more than 20% of the global economy1


Buenos Aires
19–21 October 2022

The C40 World Mayors Summit is our triennial climate action conference organised in partnership with a C40 member city. This year’s Summit, hosted by the City of Buenos Aires from 19–21 October 2022, will be a hybrid in-person and virtual event.

A graphic with a purple background containing icons created for the C40 World Mayors Summit. The icons include sketches of a bank note, a bike, a megaphone, a city and a symbol to represent community.
© C40

1. Oxford Economics, C40 modelling and World Bank GDP data (2020)