Responsible for about 70 per cent of global greenhouse gas emissions, cities can play a critical role in reducing these emissions – especially as their populations surge over the coming decades and many cities struggle with aging and inadequate infrastructure. Climate change increases the risk and stress to water, sewer, drainage and transportation systems as well as infrastructure, as these systems are more exposed to the impact of increasingly powerful hurricanes, typhoons and other natural disasters. Clear greenhouse gas reduction goals, viable strategies, enhanced capacity and tangible financing are essential for cities to reduce emissions and become increasingly resilient.