The Global Covenant of Mayors is the largest alliance for city climate action leadership representing over 1 billion citizens.The GCoM cities and local governments could reduce global emissions by 1.9 GtCO2e annually in 2030, compared to a business-as-usual trajectory, and by 76.5 GtCO2e in 2050.Greater financial investment in city climate actions is needed especially for adaptation activities; implementation of all actions could generate 11 million new jobs worldwide.