"They gathered in airboats off the northeastern corner of the Great Salt Lake shoreline. Above, clouds jostled in the vast Utah sky."

"The Bitterroot Salish, Kootenai and Pen d'Oreilles tribes consider Montana's National Bison Range part of their heritage, a link to the animals their ancestors once hunted and worshipped."

"The effects of global warming are making it more difficult for reservoir managers to control floods and manage flows for irrigation, recreation and fisheries."

"Interior Secretary Ken Salazar on Tuesday signed -- and hailed -- Utah’s latest natural-gas drilling plan as an environmentally sensitive leap toward energy security."

"CHEYENNE, Wyo. -- Wyoming's governor persuaded the head of the U.S. Environmental Protection Agency to postpone an announcement linking hydraulic fracturing to groundwater contamination, giving state officials -- whom the EPA had privately briefed on the study -- time to attempt to debunk the finding before it rocked the oil and gas industry more than a month later, an investigation by The Associated Press has found."

"U.S. officials are expected Tuesday to approve a plan by Anadarko Petroleum Corp. to drill 3,700 natural-gas wells in eastern Utah, capping a yearslong review of a project that will be one of the largest in the region."

"With Asia's energy demands pulling more U.S. coal to West Coast ports, rail-line communities across Montana fear the effects: More train traffic, health problems, noise and congestion."

"BOISE, Idaho -- It takes a lot to shock and sicken seasoned wildlife advocates, but the deliberate torture and shooting of a trapped wolf in northern Idaho by an employee of the U.S. Forest Service has. The incident in mid-March has triggered calls for both federal and state investigations leading to dismissal of the employee involved."

"JEFFERSON COUNTY, Colo. -- Families driven from their homes by a fast-moving wall of fire Monday evening said they stayed longer than was safe because authorities told them that the smoke they were smelling was from a controlled burn that was being monitored."

"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."