"As a lover of ancient rock art, Steve Acerson usually roams Utah’s backcountry searching for images of hunters and rams carved on boulders and canyon walls. But one morning, on a hillside speckled with those prehistoric petroglyphs, he was also finding signs of a younger civilization: Shotgun shells. Bullets. Shredded juniper trees. Exploded cans of spray paint."

"'Conditions may exist that could result in a... release of large volumes of contaminated mine waters,' stated a 2014 EPA report on the inactive Gold King Mine, whose toxic waters befouled rivers in 3 states earlier this month."

"President Barack Obama and Nevada's U.S. Sen. Harry Reid, two of the most powerful Democrats in the nation, are playing key roles in the National Clean Energy Summit in Las Vegas on Monday."

"Newly released documents show that firefighters responding to an oil train derailment and fire last year in Lynchburg, Va., waited more than two hours for critical details about the train and what was on it."

"Humans are throwing ecosystems out of whack by not only killing a large number of animals, but by killing adults and top carnivores in particular, a study suggests. One answer is to act more like animal predators."

"If humans hope to fish the oceans more sustainably, they are going to have to start fishing like fish, a new study suggests.

That means harvesting younger, smaller fish to leave more of their elders to continue maturing and reproducing. And it means fishing quotas that are more in line with what nonhuman predators consume.

"Expert says neonicotinoids, even at EPA’s ‘safe’ levels, could devastate aquatic invertebrates: ‘The water issue is probably as important as the pollinators’"

"As far away from society as you might seem while floating on the Colorado River through Grand Canyon National Park in Arizona, or hiking along its shorelines, heavy metals are polluting the river in concentrations that could pose a health risk."

"U.S. regulators have relied on flawed and outdated research to allow expanded use of an herbicide linked to cancer, and new assessments should be urgently conducted, according to a column published in the New England Journal of Medicine on Wednesday."

"During the five decades in which DuPont used and profited from C8, the company had only infrequently discussed the chemical with environmental authorities, and it kept most of its extensive internal research on the chemical confidential."

"U.S. crews battling a flurry of wildfires raging unchecked across the Pacific Northwest contended with high winds on Thursday, a day after three firefighters were killed and four others were injured in Washington state."