"Fifty-five percent of U.S. river and stream lengths were in poor condition for aquatic life, largely under threat from runoff contaminated by fertilizers, the U.S. Environmental Protection Agency said on Tuesday."

"BILLINGS, Mont. -- Federal regulators proposed $1.7 million in civil penalties against Exxon Mobil Corp. on Monday for safety violations linked to a pipeline rupture that spilled an estimated 63,000 gallons of crude oil into Montana's scenic Yellowstone River."

"When a Texas landowner took his fear that a gas driller had poisoned his well to federal regulators, the company, Range Resources Corp., turned around and sued him for conspiring 'to harm Range.'"

"WILLARD, Utah -- A Chevron fuel spill near a northern Utah bird refuge is much worse than originally thought as up to 27,000 gallons might have leaked, authorities said."

"Teck Coal Ltd. is facing a massive pollution problem in the Elk Valley, where a metal-like element known as selenium is leaching out of mine sites and collecting in the eggs of fish, frogs and water birds."

"WASHINGTON — A coalition of energy companies, environmentalists and Pennsylvania-based philanthropies announced Wednesday the creation of a center that would provide more stringent standards for fracking and natural gas development in the Eastern United States."

"The Supreme Court on Wednesday ruled that logging companies and forestry officials in Oregon were not required to obtain permits from the Environmental Protection Agency for storm-water runoff from logging roads."

"Transocean's chief executive testified Tuesday during the BP oil spill civil suit in New Orleans that employees should have done more to detect signs of trouble before the company's drilling rig exploded in the Gulf of Mexico in 2010."

"An underground plume of toxic hydrocarbons from an oil spill north of the Colorado River near Parachute has been spreading for 10 days, threatening to contaminate spring runoff."

"YELLOWKNIFE -- Federal officials are scrambling to clean up a crumbling, abandoned northern gold mine that is in imminent danger of releasing massive amounts of arsenic, asbestos and other toxins."