US Mayors Criticize President Trump’s Withdrawal from the UNFCCC As Dangerous For the Health and Safety of Americans
8 January, 2026 – The US Federal Government’s decision to withdraw from the United Nations Framework Convention on Climate Change...
C40 Cities: 2024 In Focus
2024 brought challenges for global climate action, but cities around the world continued to lead the way with creativity and…
‘Letter to Air’ by Mayor of Portland, Ted Wheeler
Hear from the Mayor of Portland, Ted Wheeler, ahead of the International Day of Clean Air for blue skies on...
Green News Digest: Building liveable cities through clean energy and infrastructure
How cities build, design and power their infrastructure significantly impacts residents’ daily lives and cities’ carbon footprints. Buildings alone contribute...
C40 releases 2022 Annual Report
Access C40’s 2022 Annual Report, with a foreword co-authored by Sadiq Khan, Mayor of London and Chair of C40 Cities…
How nature is combatting the climate crisis in cities
By Mark Watts, Executive Director of C40 Cities This week’s COP15 biodiversity summit is crucial for the future of life...