"Russia has rebuffed calls for a more ambitious plan to cut its carbon dioxide emissions after environmentalists branded its current pledge inadequate and backward-looking."

"Giant Sequoias growing in California's Sierra Nevada are among the largest and oldest living things on earth, but scientists climbing high up into their green canopies say they are seeing symptoms of stress caused by the state's historic drought."

"Arch Coal, the nation's No. 2 coal miner, said Thursday it has extended a deadline on private offers to swap debt until Oct. 26."

"The Environmental Protection Agency said Wednesday it will set up a temporary treatment plant for wastewater flowing from the Gold King Mine in southwestern Colorado after 3 million gallons surged out of the mine in August, tainting rivers in three states."

"As the cal­en­dar flips closer to Sept. 30, the talk on Cap­it­ol Hill is dom­in­ated by Planned Par­ent­hood and the loom­ing gov­ern­ment shut­down. But some fear that lost in the shuffle is an­oth­er, much smal­ler dead­line that could go un­ad­dressed."

"The fossil fuel divestment movement skyrocketed in the past year as hundreds of institutions and thousands of individuals committed to selling their oil, natural gas and coal holdings, according to a new report."

"Martin Winterkorn resigned as chief executive of Volkswagen on Wednesday, taking responsibility for an emissions cheating scandal that has gravely damaged the carmaker’s reputation."

"WASHINGTON — Welcomed with a fanfare of trumpets and a chorus of amens, Pope Francis introduced himself to the United States on Wednesday with a bracing message on climate change, immigration and poverty that ranged from the pastoral to the political."