"A proposed cleanup of Montana air pollution would force three industrial plants to spend $90 million on measures to improve visibility in some of the nation's prized public lands, including Yellowstone and Theodore Roosevelt National Parks."

"An energy company with oil and gas leases across much of the Blackfeet Indian Reservation’s western edge has suspended plans to drill a well near a culturally sacred ridge, halting the operation after tribal members voiced concern that it would spiritually denude the site."

"CHEYENNE, Wyo. -- The state of Wyoming, U.S. Environmental Protection Agency and two American Indian tribes announced Thursday they have agreed to additional testing of groundwater that the federal agency says may have become contaminated by gas development that includes hydraulic fracturing."

"GRAND JUNCTION, Colo.—Chevron Corp. is giving up its experimental oil shale lease in northwest Colorado, saying it wants to free up its resources for other priorities."

"The Bureau of Land Management announced Friday that it has selected a location for the nation's first wild horse ecosanctuary - a privately owned ranch in southeastern Wyoming 30 miles west of Laramie."

"High levels of winter ozone air pollution have been recorded in a Utah oil and gas field — after the phenomenon was seen in Wyoming — raising concerns that such pollution could become more widespread."

"DENVER — A road into the piney woods can be fraught with consequences. That was the premise, more than a decade ago, behind a Clinton administration rule that restricted road building on millions of acres of national forests in the West. The so-called roadless rule, fought over in court from the start, was validated last year by a federal appeals panel, setting off a wave of euphoria among supporters and consternation among critics. But there is a big wrinkle here in Colorado, which was one of only two states — Idaho was the other — that at the urging of the Bush administration developed their own rules about roads in the wild."

"Federal authorities are planning to scale back a Bush-era push to open 2 million acres of public lands in the Rocky Mountain region for commercial oil-shale development — with support from Colorado agricultural, municipal and recreation industry leaders."

"Even with California's volatile weather, where exceptions are the rule, the season has been the driest in 30 years. Without snow, hotels offer rock climbing and archery to frustrated skiers."

"HELENA, Mont. -- Montana wildlife regulators suspect more and more people are faking disabilities to take advantage of privileges granted to disabled hunters, so they want to remove one of those perks in hopes of curbing abuse."

"DENVER -- Colorado regulators decided Monday night to wait a week before they start deliberating a proposal to require oil and gas companies to publicly disclose what chemicals they use in hydraulic fracturing."

"Several times a day, long trainloads of coal trundle through Missoula to power plants in Washington. Those routine runs generate lots of electricity for homes and lots of consternation for politicians and scientists concerned about the trade-offs. In the short term, coal's convenience and low price make it a simple answer to the nation's energy needs. But its pollution, damage to water supplies and impact on global climate may produce a long-term cost we're unable to afford."

"FAIRFIELD -- The arsenic exposure risk in Fairfield is official, the health danger real. Those who live in the Cedar Valley town stand a higher risk of getting some cancers, nerve damage and brain injury with exposure to contaminants from old mine tailings over an extended period of time, according to a new Utah study."

"PLATTEVILLE — Colorado's wave of gas and oil drilling is resulting in spills at the rate of seven every five days — releasing more than 2 million gallons this year of diesel, oil, drilling wastewater and chemicals that contaminated land and water."

"U.S. prosecutors charge a man who said he was protecting his family. State residents and officials are outraged."