Much easier to do with an economic engine that is 1/8th the size of that of the United States.
By all means, let's realign our agricultural output and plant 8 times as much sugar as they do in Brazil so we can convert it to ethanol ... that'll solve all our problems.
While it would require some changes, planting cellulosic ethanol feedstocks like switchgrass doesn't require a total agricultural realignment. Switchgrass can grow in in poor soils and with minimal fertilzation.