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Extracting oil from tar sand

The proposed pipeline expansion would transport heavy crude to U.S. refineries from Alberta's "tar sands," or "oil sands," areas containing semi-solid petroleum, or "bitumen." Oil can be extracted in two ways -- both of which use enormous amounts of energy and water and emit toxic byproducts:


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A Great Plains pipeline debate
Article | A massive feat of engineering by any measure, the Keystone pipeline expansion project would transport crude oil close to 1,700 miles from "oil sands" in the icy reaches of Hardisty, Alberta, down through the Great Plains to the refineries of Port Arthur, Tex. In doing so, the giant pipe also...
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Extracting oil from tar sand
Graphic | The proposed pipeline expansion would transport heavy crude to U.S. refineries from Alberta's "tar sands," or "oil sands," areas containing semi-solid petroleum, or "bitumen." Oil can be extracted in two ways -- both of which use enormous amounts of energy and water and emit toxic byproducts:

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