6 of 10
BACKNEXT
6. Lisa Jackson
Lisa Jackson
EPA Administrator
Last year's rank: New

With Obama's climate-change agenda stalled in Congress, Jackson is tapping her agency's authority under the Clean Air Act to start regulating greenhouse-gas emissions. Her leeway for setting standards is a nightmare scenario for industry, which is gearing up for a court fight.

NEXT: Olympia Snowe and Susan Collins

Last updated September 29 2010: 11:28 AM ET
The power 50 The full list of Fortune's annual ranking of America's leading businesswomen More
25 highest-paid women Which corporate women raked it in - and how much did they earn? More
Global power brokers The 50 most powerful women in business outside the U.S. More
  • Find Homes for sale
    Real estate and homes for sale on Trulia

  • Property Type
  • Find a home in:
  • New York | Atlanta | Chicago | Los Angeles
  • Washington D.C | Houston | Philadelphia | More options