The C40 Cities Climate Leadership Group (C40) is a network of the world’s megacities committed to addressing climate change.

Acting both locally and collaboratively, C40 Cities are having a meaningful global impact in reducing both greenhouse gas emissions and climate risks. C40 brings together a unique set of assets and creates a shared sense of purpose. C40 offers cities an effective forum where they can collaborate, share knowledge and drive meaningful, measurable and sustainable action on climate change.

Explore an interactive list of the C40 Cities and our Networks and Research connecting them.

10 Years of Results

1 screen shot 2015 05 08 at 11.38.39 am.original
C40 is a data-driven organization – our mayors know firsthand that if you can’t measure it, you can’t manage it, and we adhere to that philosophy. The graphic above showcases indicative metrics for C40.

2015 marks the 10-year anniversary of the C40 Cities Climate Leadership Group. To celebrate these 10 Years of Results, we will be sharing our favorite lists of 10 results throughout the year, highlighting the many accomplishments of C40 and its member cities:

Join us as we build on the successes of the past 10 years to forge a brighter future, and stay up to date on the #RoadToParis by following us on Twitter, liking us on Facebook, and connecting with us on LinkedIn