Catalyzing solutions for sustainable cities

Urban areas are growing at an unprecedented rate, with over half of the world’s population of nearly 4 billion people now residing in cities. By 2050, the number is expected to swell to over 6.5 billion−approximately two-thirds of humanity. Rapid urbanization provides opportunities, yet challenges come in tandem. How cities respond to this fast-paced growth will have a long-lasting impact on the global environment.