The top documents tagged [upgraded crude oil]

Kalina Scherbel December 4, 2003 North American Tar Baby: Draining the Alberta Oil Sands.

Kalina Scherbel December 4, 2003 North American Tar Baby: Draining the Alberta Oil Sands.

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FOSSIL FUELS IV Tar Sand and Oil Shale. Tar (oil) Sand Tar sands are simply sands that contains a hydro carbon product called butumen. Tar sands are simply.

FOSSIL FUELS IV Tar Sand and Oil Shale. Tar (oil) Sand Tar sands are simply sands that contains a hydro carbon product called butumen. Tar sands are simply.

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FOSSIL FUELS IV

FOSSIL FUELS IV

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