National (U.S.)

"Americans can expect more major power outages because of severe weather driven by climate change, a federal report says."

"Crude oil shipped by railroad from North Dakota is drawing fresh scrutiny from regulators concerned that the cargo is adding environmental and safety hazards, something that analysts say could raise costs."

TransCanada and Department of Homeland Security keep close eye on activists, FOIA documents reveal."

A legislative and regulatory battle over slaughter of wild horses is dividing conservation celebrities and American Indians in the Southwest and Mountain West.

"As fans of 'Duck Dynasty' can attest, hunting for nutria – big, water-loving rodents with bright orange front teeth – is hugely popular in Louisiana. This might not be exclusive to the bayou for long. As winters warm, nutria could migrate across the country, according to new research."

"Heat waves are the deadliest of extreme weather events, the Centers for Disease Control and Prevention reported this week."

"MARSHALL, Mich. — As the Obama administration inches closer to a decision on whether to approve construction of the much-debated Keystone XL pipeline, costly cleanup efforts in two communities stricken by oil spills portend the potential hazards of transporting heavy Canadian crude."

"A 27-year-old U.S. program intended to warn the public of the presence of hazardous chemicals is flawed in many states due to scant oversight and lax reporting by plant owners, a Reuters examination finds."

"The Federal Railroad Administration said it is investigating the safety of transporting crude oil by rail, including whether chemicals used in hydraulic fracturing are corroding tank cars."

"Federal scientists investigating an unusually high number of dead bottlenose dolphins washing up on the East Coast said on Thursday the carcasses are showing up at a rate that is seven times higher than usual."