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how much have we used (crude oil)
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12-21-2014, 07:55 PM
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The earth's volume is about 268,000,000,000 cubic miles, about 1 200 millionth of that volume is recovered petroleum, enough to cover the surface to a depth of 4/10s of one inch.
regards
mech
Last edited by user removed; 12-21-2014 at
08:03 PM
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