We&#x27;ve been synthesizing one liquid hydrocarbon fuel for thousands of years; ethanol is pretty similar to jet fuel in energy density and combustion. I think the possibility that in the future we&#x27;ll have cheap solar&#x2F;wind grid power and use that to produce ethanol, rather than charge batteries, is more likely than people think. Ethanol production isn&#x27;t terribly efficient, but if your input power is sustainable it doesn&#x27;t really matter.