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Yes it can be made from other stuff, but today people waste corn for it.
Corn is also used to feed livestock, that is how food prices go up if the price of corn goes up
More energy is used extracting ethanol from corn than it is obtained. With sugar cane you get 2 times the energy you put in. Nothing compares with oil where you get 40 times the energy you put in.
Even if it's made from sugar cane or hemp it still uses farm land, which could be used for food or in the case of Brazil it uses land obtained from cutting more forest
And the fuel obtained is not "green", anything you burn produces CO2 - I don't think the global warming is man made , but I want to show that they lie when they call ethanol "green". They should decide : the global warming is not because of the CO2 or the ethanol is not "green"
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