"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."

"It’s only a few weeks until the end of summer, a terrible time to be a moose in the New Hampshire wild."

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

"Kerri was 4 when she started having trouble walking. Justin was 5 when he got a nosebleed that would not stop. Danielle was 7 when her legs began to ache."

"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."

"When the Silver fire ignited about 2 p.m. Wednesday, officials say the stage was set for explosive growth that initially overwhelmed residents and the emergency crews sent to get them out of harm’s way."

"Lake Okeechobee keeps rising — and so do worries about an aging dike the U.S. Army Corps of Engineers ranks among the most vulnerable to failure in the country."

"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."