"In a world awash in crude, oil producers and traders are facing a billion-barrel conundrum: where to put it all."

"Maryland Attorney General Brian Frosh became the latest voice to oppose the proposed merger between Baltimore Gas and Electric parent Exelon Corp. and Pepco Holdings."

"The endangered Santa Catalina Island fox population has reached 1,700 and may be nearing its capacity for sustainability on the resort destination off the Southern California coast, a conservation biologist said."

"St. Paul-based 3M Co, one of the world’s largest manufacturers and the maker of Post-it notes, will take new steps to ensure that its suppliers of paper, pulp and packaging provide materials that come from sustainably logged timber."

"With its roots in the tobacco industry, climate science denial talking points can be seen as manufactured doubt."

Climate change not only affects how much food is grown, but also how it gets to market. Storm surges, floods, and other extreme weather events around the world highlight the vulnerability of food distribution systems.

"A long anticipated El Nino has finally arrived. But for drought-struck California, it's too little, too late, meteorologists say."

"A train carrying crude oil along the banks of the Mississippi River derailed Thursday in a rural area of northwestern Illinois south of the town of Galena, starting a fire and leading the authorities to recommend that nearby residents leave their homes."

The UN climate talks that will culminate in Paris in December are hard to follow. Here's help.

"FRANKLIN GROVE, Ill. — For the first time in almost two centuries, wild bison are roaming east of the Mississippi River."