The president's withdrawal from a groundbreaking international climate change accord has galvanized action by subnational groups and corporations.

Onstage in San Francisco, the former U.S. Secretary of Energy explains how, in certain respects, China utilizes clean energy better than the United States does.

Three questions for political scientist Ian Bremmer, who appears in conversation with Kishore Mahbubani on Wednesday, February 6, at Asia Society in New York. Tune in at 6:30pm ET for the free live webcast.