"Native American activists gathered in Montana's capital on Tuesday to protest the deaths of hundreds of Yellowstone National Park bison killed this year to ease the worries of Montana ranchers about a cattle disease carried by many park buffalo."

"Grizzly bears at Yellowstone National Park are emerging from winter hibernation weeks earlier than normal because of the arrival of spring-like weather, with warmer-than-usual temperatures and rain instead of snow, a park spokesman said on Tuesday."

"For the past few years, the geologists Brenda Buck and Rodney Metcalf have combed the wild terrain of southern Nevada, analyzing its stony dunes and rocky outcroppings — and to their dismay, tallying mounting evidence of a landscape filled with asbestos."

"Colorado could see more infectious disease, negative impacts on the elderly and people living in poverty, as well as stresses to water, cattle and crops as byproducts of future climate change, according to a comprehensive new report commissioned by the Colorado Energy Office."

"It isn’t on its dying breath, but the J.E. Corette coal-fired power plant, for 40 years Billings’ worst air polluter, could be weeks away from its last gasp."

"CASPER, Wyo. -- The Wyoming company whose pipeline leaked 30,000 gallons of crude oil into the Yellowstone River in Montana and its sister company have had multiple pipeline spills and federal fines levied against them in the last decade, according to government records."

"Yellowstone National Park has shipped at least 200 bison near the park boundary with Montana to slaughter as the famed tourist destination seeks to reduce a herd by 900 animals this winter, a U.S. conservation group said on Friday."

"Residents of a Montana town whose water supply was tainted by an oil pipeline rupture last week got the all-clear on Friday to turn taps back on, though some reported brown or black material spurting from faucets even after their pipes were flushed."

"A second large oil spill into Montana's Yellowstone River in less than four years is reviving questions about oversight of the nation's aging pipeline network."