Former NASA scientist Jim Hansen has argued that if tar sands development continues and the massive Keystone XL tar sands pipeline is built, “it is essentially ‘game over’ for climate change.” Jay Jurie tells of the history of the extraction of crude oil from tar sands and its effects on the environment, and he reports on the proposed massive pipeline from Alberta, Canada, who stands to gain from it, the dangers involved, and the militant movement to stop it.

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