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Tar sands oil extraction: how much oil does it produce?

Few oil production methods are as controversial as tar sands oil extraction. Not only is it very expensive but it also causes enormous environmental harm1. Nevertheless, tar sands provide millions of barrels of oil every day, mostly in Canada.2 Tar sands in short Unlike conventional oil reserves, where oil is in liquid form, tar sands contain a thick and sticky form of oil called…
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