#1 Did you know that "HEET" is mostly alcohol? Alcohol is what removes water from gas tanks / gas lines.
#2 Ethanol (alcohol) fuel is not made from "food corn" directly, as humans only eat a small % of the corn produced in any year, but it can be argued that the ethanol corn is animal food, and the animals ( cattle, pigs ) are used to feed humans, but there are many people who say the U.S. in particular eats too much red meat anyway.
( for the record, I eat more than my fair share of red meat... )
So far, in my car I get:
About 31 MPG Highway (Winter) on pure gas.
About 27 MPG Highway (Winter) on 10% ethanol.
About 27.5 MPG Highway (Winter) on 30% ethanol.