U.S. Environmental Protection Agency Administrator Lisa P. Jackson speaks during the second Governors' Global Climate Summit in Los Angeles, Wednesday, Sept. 30, 2009. California's Arnold Schwarzenegger and chief executives of other states hosted the event. AP Photo logo AP Photo 1 month ago

U.S. Environmental Protection Agency Administrator Lisa P. Jackson speaks during the second Governors' Global Climate Summit in Los Angeles, Wednesday, Sept. 30, 2009. California's Arnold Schwarzenegger and chief executives of other states hosted the event.