Billings, Mont. (AP) A federal report finds pesticides, heavy metals and other airborne contaminants are raining down on national parks across the west and Alaska.
They're turning up at dangerously high levels in lakes, plants and fish.
A six-year study shows that some of the most pristine wilderness on earth has been contaminated with mercury from power plants and industrial chemicals such as PCBs. Contaminants in fish exceeded human consumption thresholds at national eight parks. And mercury and DDT levels exceeded health thresholds for fish-eating wildlife.
Some contaminants are causing male fish to develop female organs.