Carol Browner 
Few people have more say in some of America’s most crucial decisions about the environment than Carol Browner, current Director of the White House Office of Energy and Climate Change Policy and former head of the EPA. Her pragmatic approach to environmental issues has won both praise and criticism from environmentalists, but there’s no doubt that she has and will continue to make a big impact. As EPA administrator, Browner started the Brownfields Program which cleans up contaminated land and facilities and brings them back into productive use.