Kolkata joins C40, becomes fifth member city from India
C40 extends a warm welcome to Kolkata, our newest member city. The capital of India’s West Bengal state, Kolkata’s metropolitan…
Vice President Biden calls on more U.S. cities to commit to the Compact of Mayors
Today, while speaking at the National League of Cities Congress, Vice President Biden announced that 83 U.S. cities have committed to the…
C40 kicks off global pro bono ad campaign in London’s iconic Piccadilly Circus
Today, the C40 Cities Climate Leadership Group (C40) debuted its first ad for #CitiesAreKey, a global pro bono advertising campaign designed…
Mayors’ Voices: Portland Mayor Charlie Hales explains why climate action is about both planet and people
According to Mayor Hales, world leaders have done mayors a favor, capturing popular attention and making climate change both a moral…
Video: Michael R. Bloomberg on C40’s 10-year Anniversary
Michael R. Bloomberg, founder of Bloomberg Philanthropies, a C40 strategic funder, and UN Secretary General’s Special Envoy for Cities and Climate Change, congratulates C40…
Mayors Voices: Stockholm Mayor Karin Wanngård on the journey to becoming Climate Positive
We have set the ambitious goal for the City of Stockholm to be – not just climate neutral – but…