"Following a closely watched Vatican climate change meeting Tuesday at the Pontifical Academies of Sciences and Social Sciences, the attendees — including not only scientific leaders but also religious and political luminaries — have released a statement suggesting that a 2015 climate accord may be the last chance to keep global warming within a range deemed “safe” for the world, its people and its ecosystems."

"Since his first homily in 2013, Pope Francis has preached about the need to protect the earth and all of creation as part of a broad message on the environment. It has caused little controversy so far."

"The moderate global warming that has already occurred as a result of human emissions has quadrupled the frequency of certain heat extremes since the Industrial Revolution, scientists reported Monday, and they warned that a failure to bring greenhouse gases under control could eventually lead to a 62-fold increase in such heat blasts."

"HOUSTON -- As Gina McCarthy spoke for a second straight year at one of the world's top energy gatherings, the U.S. EPA administrator defended a plan to cut carbon dioxide emissions and told the power industry to focus on its ability to innovate."

"As the Arctic melts and organic matter decays, vast stores of carbon in the permafrost will be released triggering an unstoppable feedback system."

"IQALUIT, Nunavut -- The eight Arctic Council nations pledged on Friday to do more to combat climate change that is shrinking the vast frigid region, with countries trying to put aside disputes over issues like Russia's intervention in Ukraine."

An electric utility industry group this week released a report warning that EPA's "Clean Power Plan" to address climate change could hurt grid reliability. The report offers ammunition for the plan's opponents -- especially Republicans from coal-mining and coal-burning states. But a number of critics say the report's analysis is flawed.

"What happens in the Arctic doesn’t stay in the Arctic. That will be a key message over the next two years when the United States holds the rotating chair of the Arctic Council, a group that fosters cooperation between the eight countries sharing the Arctic region."

"Federal agricultural officials announced Thursday voluntary programs and initiatives for farmers, ranchers and foresters meant to build on President Barack Obama's efforts to combat global warming — and don't require congressional approval."

"A coalition of big insurance companies, consumer groups, and environmental advocates are urging the United States to overhaul its disaster policies in the face of increasingly extreme weather due to human-caused climate change."