10. Unfortunately you do use oil to produce ethanol and it does
defeat the purpose. Right now ethanol is produced from corn. But American corn farming is ludicrously energy and petroleum intensive -- from petroleum based fertilizers to the gas that runs tractors. One reason that it seems to be cost effective is the subsidies given to farmers.
For ethanol to work in terms of replacing oil, either we need a less oil intensive system of agriculture or we need to ferment something other than corn.
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