text: Often wrong but never in doubt, the geniuses of the green community. Repeat after mefor miles driven ethanol produces more carbon dioxide because it is less energy dense. Moreover ethanol burns hotter and is hydrophilic so it is hard on engine parts. Ethanol adds increase the cost of fuel, it has a big land, carbon and water use footprint, and it only survives because of the politics of the ethanol mandate and a little thing called the Iowa caucuses along with our friends at Archer Daniels Midlands and the farmers who are getting rich on high priced corn while mexicans cant afford tortillas.