The acres used for ethanol production could be used for pasture. No matter how you look at it, ethanol production raises the price and lowers the availability of food.”
Doubtful it would be turn back into ‘pasture’.
Pasture usually is the later usage of alfalfa or oat fields, not corn fields.
In any event, those corn fields could be turned back into wheat-oats-alfalfa-soybeans-sweet peas, etc.
Not without huge increases in farm subsidies.