Explore our cities
C40 has 96 member cities
Making up more than 20% of the global economy1
Directly representing 582+ million residents2


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.

Art work by Lucie Brooks showing a sketch of the Obelisco of Buenos Aires, Argentinai
© Lucie Brooks Butler

1. Oxford Economics, C40 modelling and World Bank GDP data (2020)
2. Oxford Economics data and C40 modelling (January 2022)