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London

In Focus

June 24, 2025

20 Years of C40 Cities: Local Leadership Driving Global Climate Action

From London in 2005 to 97 of the world’s largest cities in 2025, C40 Cities marks two decades of unwavering...
Press Release

June 24, 2025

C40 World Mayors Summit to be held in Rio de Janeiro on the eve of COP30

London and Rio de Janeiro (June 24 2025) – The Mayor of London and Co-Chair of C40 Cities Sadiq Khan...
Press Release

June 23, 2025

Mayors from C40 cities around the world arrive in London for Europe’s largest city-wide climate festival

London, UK (23 June 2025) – Mayors from across the C40 network, representing cities on five continents, have arrived in...
In Focus

May 28, 2025

C40 2024 Annual Report: How cities are building fairer, safer and greener communities

C40's 2024 annual report is here. Read the foreword written by co-chairs Mayor of London Sadiq Khan and Mayor of…
In Focus

April 16, 2025

Europe’s climate and industrial policies are interlinked – cities are at the heart of both

For Europe to lead in sustainable industry and achieve its climate goals, the Clean Industrial Deal must be bold, ambitious,…
Statement

March 7, 2025

Deputy Mayor of London Mete Coban MBE appointed to C40 Board

C40 Cities, a global network of nearly 100 mayors united in climate action, is pleased to announce that Mete Coban...

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C40 Cities

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