This international conference will be a gathering at the nexus of cities, climate change science and innovation, and is co-hosted by UN-Habitat and the Global Covenant of Mayors for Climate and Energy (GCoM). It will bring together over 1,000 city leaders, scientists, researchers, innovators, academics, youth and business people to advance pragmatic and action oriented research and science that will help cities reduce their carbon footprint and increase resilience to climate change.