"The U.S. Supreme Court on Tuesday agreed to weigh a challenge by industry groups and some states to an Obama administration regulation intended to limit emissions of mercury and other hazardous pollutants mainly from coal-fired power plants."

"The Obama administration is expected to release on Wednesday a contentious and long-delayed environmental regulation to curb emissions of ozone, a smog-causing pollutant linked to asthma, heart disease and premature death."

"If you're heading to the airport to fly to the East Coast for Thanksgiving, expect delays of three to six hours."

"The Interior Department is scrambling to meet a September 2015 deadline to avert an Endangered Species Act listing for the greater sage grouse -- what some Westerners warn would be a political and economic disaster."

"Macklemore rolls up in his signature old black Cadillac, sporting black Ray-Bans and big boots."

"Lake Powell is at historic lows, offering kayakers new channels to explore but raising the alarm about water."

"Scientists up and down the West Coast are monitoring what appears to be a large-scale die-off of young Cassin’s auklets, small seabirds whose breeding grounds include a colony in the Farallon Islands west of San Francisco."

"The Environmental Protection Agency on Monday rejected parts of a key Texas clean-air plan, setting up a conflict with deep implications both for the state’s electricity mix and air quality across much of the country."

"As biotech masterminds and venture capitalists scramble to hatch a new generation of environmentally friendly fuels that can help power the average gasoline-burning car, they are confronting an unexpected obstacle: the White House."