| http://www.w3.org/ns/prov#value | - re $100 or higher, the returns on investment are not what they used to be.''The new oil being found and produced is in ultra-deep ocean waters, in sands that must be heated to release the hydrocarbons, or trapped in shale or other tight rock that requires constant drilling to keep production steady.That makes this new oil far more expensive to get out of the ground than what is known as conventional
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