C40 Cities and United Cities and Local Governments (UCLG) are the permanent conveners of the U20.

C40 is a network of mayors of nearly 100 world-leading cities collaborating to deliver the urgent action needed right now to confront the climate crisis.

For more information on C40:

UCLG is the world organization of local and regional governments and their associations, representing and defending their interests on the world stage.

For more information on UCLG: