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Oil Sands Mining Uses Up Almost as Much Energy As It Produces
2013-02-19 11:31:00| Climate Ark Climate Change & Global Warming Newsfeed
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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