The use of oil will likely destroy us before we run out of oil. Conservative scientists estimate that oil will be around for 4000 years, though I don't know if that accounts for increase in the *rate* of usage. Nevertheless, that time period is as far from now as the Great Pyramids are from now.
Even if oil did dry up, other energy supplies are out there. Sure, they would be expensive to implement, but that sort of economic incentive is just what's needed, IMO. The only reason we don't have hydrogen cars zooming about right now is that oil is so dirt cheap to get.
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