From left, David Roberts covers energy and climate change for Vox; Rafe Pomerance, chairman of Arctic 21, a network of organizations focused on communicating the unraveling of the Arctic as a result of climate change to policy makers and the public; and moderator Mark Hughes, founding faculty director of the Kleinman Center for Energy Policy at the center's event, "Energy Policy Then and Now," Sept. 12, 2019 in Philadelphia.
Paul Papier / For the Kleinman Center for Energy Policy