clipped from: www.popsci.com   

Ethanol is a renewable, homegrown fuel that can help lower U.S. dependence on foreign oil. But as more and more ethanol is made from corn, less and less corn is available for food production, and that’s causing some unforeseen problems.

Corn is a mainstay of American agriculture— it’s an important ingredient in cereals and baked goods, and corn syrup is used to make processed foods like candy, chips and soft drinks. But most importantly, corn is the major source of food for cattle, pigs, turkeys and chickens that are headed for the dinner table.


U.S. ethanol production could consume more than half of U.S. corn, wheat and coarse grains by 2012, driving up food prices and causing shortages

The study estimates that booming ethanol production has already raised U.S. food prices by $47 per person annually. In Mexico, protests have already erupted over the high price of corn tortillas, a staple food in the local diet.