The C40 Forum will feature mayors, climate experts, and international thought leaders in a series of discussions and presentations, showcasing the importance of city-driven climate actions and the success of the C40 network model.

Photo: Alexandre Duret-Lutz

C40 Forum, Paris 2015

The invite-only C40 Forum took place during COP21 in Paris (4 December, 2015). The Forum provided a key opportunity for C40 mayors to demonstrate their continued leadership in addressing climate change, and helped showcase the impact and successes of city-to-city collaboration. Mayors and city leaders spoke to both their cities’ achievements in sustainability and climate action and the benefits of working together through C40’s global network.

Watch video from the Forum or learn more.


Click on the image below to view the detailed agenda.


Event and Venue Information

The C40 Forum took place on 4th December 2015 at Hôtel de ville, Paris City Hall.

Thank you to the city of Paris for hosting this important conversation.

Google map.


  • Mayor Eduardo Paes, Rio de Janeiro
  • Gregory Hodkinson, Arup Chair
  • Mayor Boris Johnson, London
  • Lord Mayor Clover Moore, Sydney
  • Mayor Yong Wan, Wuhan
  • Mayor Kgosientso Ramokgopa, Tshwane
  • Lord Mayor Frank Jensen, Copenhagen
  • Mayor Charlie Hales, Portland, Oregon
  • Mayor Mitch Landrieu, New Orleans
  • Mayor Karin Wanngård, Stockholm
  • Mayor Giuliano Pisapia, Milan
  • Mayor Patricia de Lille, Cape Town
  • Mayor Anne Hidalgo, City of Paris



  • Antha Williams, Bloomberg Philanthropies
  • Jesper Nygård, Realdania 
  • Shirley Rodrigues, Children’s Investment Fund Foundation (CIFF)


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Press and Media

C40 facilitates requests from the press/media to interview C40 mayors or other key speakers associated with the Forum. Media and press requests should be sent to for further information.

Media coverage from the C40 Forum, Paris 2015 will be available after the event.

Watch Video from the Event