"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."

"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."

"The company chairman would later mock climate models as unreliable while he campaigned to stop global action to reduce fossil fuel emissions."

"Casting the fight against climate change as an urgent moral duty, Pope Francis in June urged the world to phase out highly-polluting fossil fuels. Yet in the heart of U.S. oil country several dioceses and other Catholic institutions are leasing out drilling rights to oil and gas companies to bolster their finances, Reuters has found."

"DES MOINES, Iowa – Democratic presidential front-runner Hillary Rodham Clinton declared opposition to the proposed Keystone XL pipeline on Tuesday, ending a long and politically uncomfortable silence on an issue that has become a touchstone for environmentalists and liberal voters."

"California’s historic drought is in its fourth year and gloom-and-doom scenarios of its impact on everything from killing the state’s vegetation and triggering bug infestation to destroying farming jobs have been trickling in daily."

"The world has experienced record-breaking warmth every month so far this year, and NOAA scientists say global warming and El Niño are the cause".

"David Letterman has lined up his first television gig since retiring from 'Late Show' in May. The comedian will appear as a correspondent in the second season of the climate change documentary series, 'Years of Living Dangerously,' which will premiere on National Geographic in October 2016, just ahead of the presidential election."