24 - 25 June 2025
Online & In-Person (London)
60
Speakers
2000+
Delegates
Inspiring
Keynotes
Fireside
Chats
Roundtable
Discussions
Networking

C40 is a network of nearly 100 mayors of the world’s leading cities working to deliver the urgent action needed right now to confront the climate crisis and create a future where everyone, everywhere, can thrive. Mayors of C40 cities are committed to using a science-based and people-focused approach to help the world limit global heating to 1.5°C and build healthy, equitable and resilient communities. We work alongside a broad coalition of representatives from labour, business, the youth climate movement and civil society to support mayors to halve emissions by 2030 and help phase out fossil use while increasing urban climate resilience and equity.
The current co-chairs of C40 are Mayor Sadiq Khan of London, United Kingdom, and Mayor Yvonne Aki-Sawyerr of Freetown, Sierra Leone; three-term Mayor of New York City Michael R. Bloomberg serves as President of the Board. C40’s work is made possible by our three strategic funders: Bloomberg Philanthropies, Children’s Investment Fund Foundation and Realdania.
Tel: + 1 (771) 215-8015
Why not try these links to see what our SmartCitiesWorld AI can tell you.
(Please note this is an experimental service)
How do C40 mayors use science-based approaches to limit global heating?What strategies help C40 cities halve emissions by 2030 effectively?How does C40 support urban climate resilience and equity initiatives?In what ways do C40 partnerships with labor and youth enhance impact?What roles do Bloomberg Philanthropies and other funders play in C40?