Our Accelerators

Accelerator Reports

Published February 2022

Since 2017, mayors of world-leading cities have committed to taking urgent climate action by signing C40 Accelerators. To assess how cities have delivered on their pledges, C40 Cities conducted a thorough reporting process in 2021.

Asian female engineer working on construction site, Hangzhou
© sinology / Getty Images

In June 2022 “Declarations” were renamed “Accelerators” to reflect the pace required to meaningfully address climate breakdown and create a safer, healthier future for urban residents.