"The muzzles are coming off for [Canadian] federal scientists. For years, scientists who worked for the federal government were silenced by strict rules that made them seek departmental approval before speaking to the press. On Friday, Minister of Innovation, Science and Economic Development Navdeep Bains said that scientists are free to speak to the media about their work."

"President Obama announced on Friday that he had rejected the request from a Canadian company to build the Keystone XL oil pipeline, ending a seven-year review that had become a symbol of the debate over his climate policies."

"Did climate change cause that heat wave? That hurricane? That drought? A new collection of studies examined extreme weather events last year, including drought, floods and storms, to look for signs that climate change was a cause or contributor — and found mixed results."

"Details of the Trans-Pacific Partnership (TPP) deal were released Thursday, potentially setting off another round of debate on the controversial agreement involving one dozen nations."

"The opening of an investigation of Exxon Mobil by the New York attorney general’s office into the company’s record on climate change may well spur legal inquiries into other oil companies, according to legal and climate experts, although successful prosecutions are far from assured."

"Democratic presidential contender Bernie Sanders on Wednesday threw his weight behind a climate-change bill that would crack down on fossil fuel extraction, a move sure to please activists who want party front-runner Hillary Clinton to make the same commitment."

"More than two dozen U.S. states and cities asked a federal court Tuesday to let them help defend the Obama administration's carbon emissions reduction plan from legal challenges being brought by other states."

"Climate change has been blamed for many things over the years. Never, until now, has anyone thought it was possible to see it as a kind of contraceptive.:

"China, the world’s largest carbon emitter, has been dramatically underreporting the amount of coal it consumes each year, it has been claimed ahead of key climate talks in Paris."