City leaders from C40 cities are sharing bold solutions to the climate crisis at the World Mayors Summit 2025, focusing on cutting emissions, redesigning public spaces, and creating fairer, more resilient communities. A joint assessment from GCoM and C40 Cities shows strong growth in local climate implementation, with companies like Amazon, DHL Supply Chain, and Scania taking action supported by initiatives like Laneshift. The overall goal is to secure a fair and livable future for all through collaborative efforts and innovative solutions.