The power of global collaboration

C40 networks connect people working in cities around the world who are tackling similar challenges and opportunities for climate action.


Working across multiple sectors and issues, C40 convenes networks that provide a range of services in support of cities’ climate change efforts. C40 has 17 networks organised under 6 initiative areas covering the mitigation, adaptation and sustainability topics of highest priority to C40 cities and with the potential for the greatest climate impact. 

C40 networks help cities replicate, improve and accelerate climate action. These city-only working groups provide for honest knowledge exchange, enabling cities to tap into the global expertise of their peers as well as connect with technical partners. Through networks, cities find opportunities to undertake joint projects in areas of mutual interest and benefit. C40 networks also amplify individual city solutions by providing a global platform for showcasing city successes.

C40 Networks Lead to Results

One third of the actions member cities reported were directly influenced by collaboration between cities, 80% within C40. These actions are the result of our Networks' four-pronged approach, designed to:

  • • Connect city officials with their peers around the world to help deliver solutions to climate challenges; 
  • • Inspire innovation by showcasing the ideas and solutions of leading global cities;
  • • Advise city peers based on experience with similar projects and policies; and 
  • • Influence national and international policy agendas and driving the market by leveraging the collective voice of cities.


Below, we invite you to explore our networks, which are organized into Initiative areas.

Consolidated fact sheets about our networks are also available for download in English, Spanish, and Mandarin.


Current Networks by Initiative