Nobody has mentioned coal (except once in passing as a joke). The state of Utah alone has one trillion tons in accessible coal reserves. Of course coal-fired aeroplanes are a bit unlikely, but fuels are fungible. For aviation purposes, it would be possible to synthesise oil using coal as the energy source. Wouldn't make much sense for the Range Rover but cars are a much less demanding environment - ethanol is just fine for them (maybe biodiesel too).
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