• 40. Nancy Sutley
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Serving as Los Angeles's deputy mayor for energy and environment, Sutley was a driving force in an initiative to make it "the greenest big city in America." Her responsibility increased tremendously in January, however, when Obama appointed her to chair the White House Council on Environmental Quality, making Sutley (a former Hillary Clinton supporter) the principal environmental policy adviser to the president -- and the first prominent gay person to earn a senior role in his new administration.