The tar sands are North America's largest pool of carbon, and NASA's top scientist James Hansen says that exploiting them means 'essentially game over' for the climate. Keystone will ship tar sands oil across critical water supplies and sensitive...

Clean Water Act, including lead, mercury, and arsenic into the Athabasca River in northern Alberta, which flows 3,000 miles downstream to the Arctic Ocean;Recognizing that tar sands production produces three times the greenhouse gas emissions of conventional...

So here are 3 things you can do for Mann: I’m about halfway through the book and can say its target audience is the exact same people who read Climate Progress — readers who want to be informed about real climate science and the state of the climate...

You evidently had to submit questions in writing, after which they were screened in some undisclosed way. I attended a James Hansen appearance in Minnesota where he ducked tough questions in the same way. Penn State professor Michael Mann addressed...

Mann said pro-coal groups had been encouraging people to write letters to their local newspapers to prevent Mann from speaking yesterday. During the presentation, Mann said there are dozens of lines of evidence pointing to climate change, citing...

“It is time to address real, tangible environmental issues.” In an emailed interview with Financial Post, Prof. Clark explains why the environmentalists “have lost their way” and why NASA scientist James Hansen and former U.S. Vice-President Al Gore...