The Yearly Offer of Action is an initiative led by C40 Cities and the Global Covenant of Mayors for Climate & Energy (GCoM) that shows how cities are delivering climate action every single year.

Each year, ahead of the UN climate conference (COP), mayors set out a concrete action they’ll deliver in the next 12 months and report back on what they achieved in the last.

Global climate goals are only met when action happens on the ground. The Yearly Offer of Action shows cities are already making it happen. 

First launched by C40 and GCoM in 2025, with an initial cohort of 40 cities, the initiative has grown to 69 cities and actions this year. 

Find out below what GCoM cities and mayors are doing over the next 12 months to show that cities are a powerful source of action, and check out all 69 cities at c40.org/yooa.