"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."

"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."

"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."

"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."

"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."

"WASHINGTON -- The Shell Oil Company must provide a detailed plan addressing numerous safety and operational issues that plagued its efforts to extract oil beneath the Arctic Ocean last year if it wants to resume drilling off the coast of Alaska, the Interior Department said Thursday."

Rescuers are struggling to save manatees in Florida, there a Red Tide algal bloom has killed 181 of the mammals so far this year.

"KALAMAZOO, Mich. -- The U.S. Environmental Protection Agency is ordering Enbridge Inc. to do additional dredging in the Kalamazoo River to clean up oil from a massive 2010 spill."

"NEW ORLEANS -- BP's cement contractor on the Deepwater Horizon rig has discovered cement samples possibly tied to the ill-fated drilling project that weren't turned over to the Justice Department after the 2010 oil spill, a lawyer for the contractor said Thursday."

"U.S. EPA will head to court [Thursday] to defend its authority under the Clean Water Act to revoke a strip mining permit issued by the Army Corps of Engineers."

"When Uranium Energy Corp. sought permission to launch a large-scale mining project in Goliad County, Texas, it seemed as if the Environmental Protection Agency would stand in its way. To get the ore out of the ground, the company needed a permit to pollute a pristine supply of underground drinking water in an area already parched by drought."

"Hulking, pitch-black mounds resembling coal have grown exponentially in the last week along the banks of the Detroit River in southwest Detroit, prompting concern about potential pollution from residents and legislators on both sides of the river."