Ethanol
I do not profess to being an expert in ethanol but all that I've read is that ethanol is NOT the solution to our energy needs and may even cause more harm than good. For example, cities such as Houston and Los Angeles that switch to ethanol saw a decrease in overall air quality. In addition, a recent article states that it takes approximately 4 to 5 gallons of water to produce 1 gallon of ethanol, and this does not include the water and fertilizer corn needs in the field. This issue was brought up because an ethanol plant recently began to tap water from the Minnesota River after it depleted the local groundwater supply w/n a year of opening up...
Here is a great site with all your ethanol related questions