Jan 2017 – Dec 2020

C40: Carbon neutral cities by 2050



Multiple countries – Global

To support cities to become carbon neutral by 2050

$24,300,000 Grant Value

$150,000 evaluation budget


Other funders

  • Bloomberg Philanthropies -

  • Realdania

The Paris Agreement has set the target: to ensure a climate safe world, all actors must help constrain global temperature rise to less than 1.5 degrees Celsius. This means accelerating decarbonisation and avoiding lock-in of high carbon infrastructure before 2020. 

C40's core mission, working in close collaboration with mayors, city practitioners and technical partners, is to support cities to meet the goals of the Paris Agreement. 

C40 is a network that connects more than 90 of the world's greatest cities, representing 650+ million people and one quarter of the global economy. It engages, supports and commits mayors to take actions on climate change and facilitates technical assistance and peer-to-peer exchange (sharing best practices) across mobility, land use planning, energy, buildings and waste sectors.

For more than a decade, mayors of the world's largest cities have been among the most outspoken and boldest innovators in taking climate action. 

Through C40's thematic networks, city officials advise and learn from each other about the successes and challenges of implementing climate action. These provide a platform for cities to showcase their climate action solutions and inspire their city peers. 

C40 networks also help cities engage with technical experts and undertake collective actions that demonstrate the power of cities working together. By showcasing the leadership of these mayors, C40 is setting the global agenda on what true commitment to climate action means for political leaders at every level.


Leading climate cities will deliver Paris-compatible Climate Action Plans that spell out how each city will achieve a carbon neutral status by 2050. This includes achieving:

  • Next-generation mobility to accelerate zero-emission vehicle adoption (including preparing for autonomous vehicles adoption)
  • Transit Oriented Development to design and build compact, dense cities
  • Energy efficient buildings
  • Decarbonised electricity grids
  • Improved waste management