WASHINGTON — Environmental Protection Agency Administrator Lisa Jackson says she's stepping down after nearly four years on the job.
Jackson announced her departure in a statement Thursday. She gave no particular reason for leaving but said she was ready for new challenges, time with her family and new opportunities to make a difference.
Jackson's tenure was marked by high-profile brawls with industry and congressional Republicans over such issues a global warming pollution, the Keystone XL oil pipeline and new controls on coal-fired plants.