Physicist Steven Chu has been chosen to serve the new Obama Administration as Secretary of Energy. The Nobel Prize-winning physicist heads the Lawrence Berkeley National Laboratory at the University of California at Berkeley. A Chinese-American, Chu is a professor of physics and molecular and cell biology and he has pushed aggressively for research into alternative energy as a way to combat global warming.

Other key appointments being rumored include: Carol Browner, who was EPA administrator under President Bill Clinton, to fill a new White House post overseeing energy, environmental and climate policies. Also, Lisa Jackson, former head of the New Jersey Department of Environmental Protection is expected to head the Environmental Protection Agency. And Nancy Sutley, a deputy mayor of Los Angeles, is expected to be nominated chair the White House Council on Environmental Quality.

Obama insiders say several candidates remain under consideration for the Secretary of the Interior post. Some say further announcements of appointments will not come this week, contrary to what was previously believed.