"An abandoned pipeline that was cut off underground and left uncapped and connected to a natural gas well fueled an explosion that destroyed a Colorado home and killed two people last month, investigators said yesterday."

"An explosion at a home in Colorado, which killed two people and prompted the state's biggest oil producer to shut down some of its wells, has highlighted the tension between Colorado's flourishing oil business and its rapid housing development."

"A giant aquifer below an eastern Idaho federal nuclear facility is as free of radioactive contamination and other pollutants as it has been in more than six decades of monitoring but the water level of the aquifer is at its lowest ever recorded, according to a U.S. Geological Survey report released this week."

"Wildlife conservation groups sued the U.S. government on Wednesday seeking to halt a plan to trap and kill as many as 120 mountain lions and black bears in Colorado in a bid to stem declines in populations of mule deer favored by hunters."

"Nevada lawmakers pressed forward Wednesday with a package of bills they say will make homemade solar energy an affordable option once again for state residents."

"CROW AGENCY, Mont. — The pale yellow halls of the Crow government building here are nearly empty these days, with 1,000 of this tribe’s 1,300 employees recently laid off."

"RENO — Sierra Club lawyers who've preached against the environmental evils of coal-burning power plants for decades are trying to force the closure of the last significant one in renewable energy-rich Nevada with arguments based on a different sort of green: money."

"U.S. officials are pressing a federal judge to lift his 2015 order blocking a proposed irrigation dam and fish passage on the Yellowstone River, warning that a rapidly-disappearing, ancient fish species faces a grim future with further delays to construction."