From the Associated Press:
_National forests and parks — long popular with Mexican marijuana-growing cartels — have become home to some of the most polluted pockets of wilderness in America because of the toxic chemicals needed to eke lucrative harvests from rocky mountainsides, federal officials said.
The grow sites have taken hold from the West Coast’s Cascade Mountains, as well as on federal lands in Kentucky, Tennessee and West Virginia.
Seven hundred grow sites were discovered on U.S. Forest Service land in California alone in 2007 and 2008. . .
“What’s going on public lands is a crisis at every level,” said Forest Service agent Ron Pugh. “These are America’s most precious resources, and they are being devastated by an unprecedented commercial enterprise conducted by armed foreign nationals. It is a huge mess.”_