Oil Sands Mining Uses Up Almost as Much Energy As It Produces

Posted by InsideClimate: None Given on February 19th, 2013
InsideClimate: The average "energy returned on investment," or EROI, for conventional oil is roughly 25:1. In other words, 25 units of oil-based energy are obtained for every one unit of other energy that is invested to extract it. But tar sands oil is in a category all its own. Tar sands retrieved by surface mining has an EROI of only about 5:1, according to research scheduled to be released Tuesday. Tar sands retrieved from deeper beneath the earth, through steam injection, fares even worse, with a maximum......

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