Corn-based ethanol has a very low energy yield. It takes a lot of corn to make ethanol. Making corn requires gas, which requires oil, and you see where this is going. It's also highly subsidized by the government. It's something, but it's not the solution. There is no silver bullet to cure our oil dependency.

One of the reasons Brazil has been so successful is sugar cane has a much higher energy yield. When we figure out how to grow sugar cane in Kansas and Iowa, it'll be a different story.