network of megacities

C40 Cities (2005; London; 204 staff;

A global leadership organization constituted as a network of megacities committed to acting against climate change. It aims to “increase resilience, cleaning the air we breathe and tackling inequality by ensuring that global heating does not exceed 1.5 °C, while also preparing for 3 °C of heating or more.”



  • GPC – It is a greenhouse gas emission protocol “standard developed by C40, World Resources Institute and ICLEI – Local Governments for Sustainability.”


Leadership: Eric Garcetti (Chair of C40) and Michael R. Bloomberg (President of the Board)
$25.5m (2019)