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The key is to replace crude oil which is now largely used for ground transportation.
Pluggable hybrid cars can do the trick if we can get through the next 10 years while they begin to take over.
And natural gas can begin to replace coal for electric power generation needs as suggested below.
Crude has moved from about 70 to about 80 with no increase in demand, as Saudi and OPEC production, a good indicator of actual demand as the Saudis set price to their refiners and let quantity adjust, was relatively flat last month.
So it looks like the Saudis simply changed their prices under cover of investors giving the futures a bid as they moved maybe another $20 billion (from on what I’ve heard) into that asset class during October.
By Daniel Yergin and Robert Ineson