Mountain West (CO ID MT NV UT WY)

"Leo Garcia hadn't heard of trichloroethylene about four decades ago when he moved into his red-and-white house just west of Cheyenne."

"CHEYENNE, Wyo. — A federal judge is set to hear the state's request to dismiss a lawsuit filed by groups challenging Wyoming laws enacted this year that restrict data collection on open land."

"Emission controls required on out-of-state power plants have yielded big reductions in mercury pollution in Western Maryland's air, a study has found. So far, however, the state's fish remain as contaminated with the toxic chemical as ever, researchers say."

"The shaggy offspring of the United States' only wild, purebred herd of bison are pitting Montana conservationists, federal wildlife managers, ranchers and Native American tribes against each other."

"Colorado's agricultural agencies are in panic mode after several independent studies found dangerous levels of pesticides in marijuana products."

"The Interior Department plans to cancel a long-suspended oil and gas drilling lease near Glacier National Park that's on land considered sacred to the Blackfoot tribes of the U.S. and Canada, according to court documents filed Monday."

"Yellowstone National Park is proposing to reduce its celebrated bison herd by 1,000 animals this winter by rounding up those wandering into adjacent Montana and delivering them to Native American tribes for slaughter, officials said on Wednesday."

"A national movement urging President Barack Obama to stop any new federal leases for fossil fuels turned its attention on Salt Lake City Tuesday, staging a victory party after the Bureau of Land Management postponed an oil and gas lease sale."

"SALMON, Idaho -- Native American tribes on Wednesday called for the U.S. government to halt plans to strip grizzly bears in and around Yellowstone of Endangered Species Act protection because it would open the way for trophy hunting in Idaho and two other states bordering the national park."