"The Obama administration announced a set of executive actions and commitments by over a dozen companies to curb the use of super greenhouse gases known as HFCs, which have a global warming potential 10,000 times greater than carbon dioxide."

"JAKARTA -- The forest fires blanketing Southeast Asia in choking haze are on track to become among the worst on record, NASA has warned, with a prolonged dry season hampering efforts to curb a crisis that has persisted for nearly two decades."

"The body examining the practices of the car industry following the Volkswagen emissions scandal has been accused of a major conflict of interest after it emerged that nearly three quarters of its funding comes from the companies it is investigating."

"The Obama administration on Thursday unveiled a major new regulation on smog-causing emissions that spew from smokestacks and tailpipes, significantly tightening the current Bush-era standards but falling short of more stringent regulations that public health advocates and environmentalists had urged."

"In August 2011, as President Obama prepared to unveil a major new environmental regulation on smog, his political advisers issued a warning: The rule would affect power plants and factories throughout the Midwest, slowing the economy in states like Ohio that would be crucial to the president’s re-election."

"The Environmental Protection Agency announced new rules Tuesday to reduce toxic air pollution from oil refineries by forcing operators to adopt new technology that better monitors and controls emissions."

"The Environmental Protection Agency is set to release a contentious new rule limiting surface-level ozone pollution."

"The U.S. Environmental Protection Agency plans sweeping changes to the way it tests for diesel emissions after getting duped by clandestine software in Volkswagen cars for seven years."

"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."

"The Environmental Protection Agency and the California Air Resources Board claim VW deliberately programmed almost 500,000 diesel cars to emit fewer pollutants under test conditions than during actual use."