If you look at across the whole life cycle of growing corn, making ethanol and burning it in a car, and compare that to what happens when you find oil and make gasoline and burn it in a car, you only have about 15 percent less greenhouse gas going into the air from burning ethanol than you would if you're burning gasoline.

NPR: Biofuels and Food Prices

The life cycle of the whole unpleasant subject (already over a decade long) would be indefinitely extended as well, especially if Wal-Mart is compelled to publicly allocute as to its HR policies and practices.

FORBES: Wal-Mart Could Face Major Unanticipated Problems in Historic Class Action