"A U.S.-led drive to reduce soot and other heat-trapping air pollutants worldwide is less promising than hoped as a new front in the fight against climate change, according to a study published on Monday."

"MEXICO CITY — President Enrique Peña Nieto of Mexico on Monday, pushing one of the most sweeping economic overhauls here in the past two decades, proposed opening his country’s historically closed energy industry to foreign investment."

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

"PORTLAND, Maine -- A shell disease that has plagued the southern New England lobster industry for years by making lobsters unsightly and in some cases unmarketable appears to be creeping northward to the lobster-rich grounds off the coast of Maine."

"On John Bassler's 143-acre Piney Run Foxhound Training Preserve in Milford, Va., a densely wooded property lined with electrified fences to keep about 30 wild foxes inside contained, the chase is recreation, he said, part of a Virginia tradition commonly known as 'fox penning.'"

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."

"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."