Ethanol is renewable and can be made from several sources, right now corn is the cheapest source and in surplus.
It might be the cheapest source to make Ethanol in the United States, but it doesn't get PRICED as it should.
In Brazil, Ethanol is a popular fuel that costs well under half of what Gasoline sells for. The people who set up Ethanol production in the US price it very close to the equivalent price of gasoline and are raking in money hand-over-fist in the process.
Meanwhile, corn prices are inflated in the US that raises prices the price of meat .from corn-fed livestock (everything from chickens and pigs to cattle).
The best thing to do with the Ethanol industry is to run it out of business.