A new study says that U.S. emissions of the greenhouse gas methane, often emitted by farm and energy operations, are much larger than previously estimated.

"The U.S. government's authority to regulate air pollution nationwide, often against the wishes of Republican-leaning states, could face new curbs when the U.S. Supreme Court takes on two high-stakes cases in coming months."

"TORONTO -- Ontario is going coal-free. The largest coal-burning power plant in North America, Nanticoke Generating Station on the north shore of Lake Erie, will stop burning coal this year, Ontario Premier Kathleen Wynne announced on Thursday."

"WARSAW — Two weeks of United Nations climate talks ended Saturday with a pair of last-minute deals keeping alive the hope that a global effort can ward off a ruinous rise in temperatures."

"Nitrous oxide (N20) emissions could almost double by 2050 if more aggressive action is not taken, undermining global efforts to curb climate change, the United Nations' Environment Programme (UNEP) said on Thursday."

"Halfway across the world from the typhoon-ravaged Philippines, several small, remote communities at the northwestern tip of Turtle Island have been declared disaster areas from damage wrought by severe storms and flooding in mid-November."

"WARSAW, Poland -- Thirteen environmental and climate justice groups today withdrew from the UN climate change negotiations in Warsaw to protest what they see as lack of action from governments to solve the climate crisis."

"American Geophysical Union adds legal counseling to its Fall Meeting agenda, citing scientists' need to defend against increasing attacks on research, correspondence and public statements."

"Chevron, Exxon and BP among companies most responsible for climate change since dawn of industrial age, figures show"