"You might expect the biggest lease owner in Canada's oil sands, or tar sands, to be one of the international oil giants, like Exxon Mobil or Royal Dutch Shell. But that isn't the case. The biggest lease holder in the northern Alberta oil sands is a subsidiary of Koch Industries, the privately-owned cornerstone of the fortune of conservative Koch brothers Charles and David."

"A new report from the Center for American Progress examines some historical industry claims about how much new pollution regulations would cause electricity prices to spike, and finds that industry estimates have been higher than the reality."

"Environmentalists fighting the Keystone XL pipeline are rallying to block a Maryland natural gas export terminal as momentum builds to use the U.S. fuel as a weapon against Russia’s intervention in Ukraine."

"President Barack Obama’s advisers are lining up against the proposed Keystone XL oil pipeline. Top Democratic donors oppose the project. And Obama himself dismisses claims that it will create many jobs."

"The White House launched an initiative Wednesday aimed at expanding the use of climate data nationwide, to help communities cope with the impacts of global warming."

"One of the planet's top dipsticks is in trouble. The 'Keeling curve,' the most famous measurement of the world's rising levels of carbon dioxide for the past six decades, is in jeopardy from funding shortfalls."

"Environmental groups filed a federal lawsuit in New Orleans on Tuesday against United Bulk's coal export facility in Plaquemines Parish, alleging the facility is polluting the Mississippi River."

"President Obama wants Americans to see how climate change will remake their own backyards — and to make it as easy as opening a web-based app."

"Federal regulations for reporting toxic chemicals in consumer products have not changed in decades, but Vermont is poised to join other states to label – and possibly ban – products containing chemicals considered harmful to public health."

Duke Energy lobbyists asked the GOP-controlled North Carolina legislator for a legal loophole protecting it from having to clean up coal-ash pollution, after environmentalists sued to force clean-up. The legislature obliged, and GOP Gpovernor Pat McCrory signed it.