Cities must play a critical role in addressing the causes of climate change and in preparing for resilience to climate effects.Municipal governments must balance development needs with crisis response and long-term climate-smart planning. Cities can’t tackle these challenges alone; they must leverage private innovation and financing. This event highlights the various roles that cities can play in addressing climate change: as regulators, project sponsors, fundraisers of capital, overseers of multi-connected systems, and as partners with the private sector, leveraging their relationship for green standards, innovation, technical expertise, and green finance. Case studies with speakers from around the world will illustrate each of these roles, highlight the sectors with some of the most pressing climate needs and with most opportunities, including green and resilient affordable housing, water and sanitation, and others.