Who Are Obama's Key Energy Advisers?—PICTURES

Obama: Steven Chu: The Energy secretary is a Nobel Prize-winning physicist steeped in climate-change research. First viewed as a sterling pick for the agency’s top job, he has been tarnished by the Solyndra controversy and is considered unlikely to stick around for a second term. (Liz Lynch)

Obama: Lisa Jackson: The EPA administrator brought an environmentalist’s zeal to the task of enacting controversial clean-air regulations on coal-fired power plants. Republicans have made Jackson a top target, attacking her as the face of “job-killing” regulations. (Chet Susslin)

Obama: Ken Salazar: The Interior secretary is a former senator from Colorado with a strong understanding of both the renewable-energy and the fossil-fuel industries. He survived the BP oil spill and oversaw a fundamental restructuring of his agency in its wake. (AP Photo/Patrick Semansky)

Obama: Heather Zichal: She served as a deputy to Carol Browner, Obama’s first energy and climate “czar.” Since Browner’s departure in 2011, Zichal has been Obama’s chief energy adviser. (PHOTO: PABLO MARTINEZ MONSIVAIS/AP)