Bright Lights, Big Challenges


Cities are enormous polluters, consuming two-thirds of the world’s energy and creating more than 70 percent of global CO2 emissions. But they are also among the most vulnerable to the impacts of climate change — from coastal flooding to wildfires. How can cities reduce their carbon footprint and boost their resilience to climate risk? What are the latest ideas and opportunities?

Rahm Emanuel, Mayor, City of Chicago

Edwin M. Lee, Mayor, City and County of San Francisco

In conversation with Thomas L. Friedman