What needs to be understood is that if ethanol is volumetrically equal to gasoline then the ethanol engine is 30 percent more efficiency with ethanol and offers 33 percent less carbon per mile. Energy in to work out, the average drive cycle in cars today see an average of our cars today

Ethanol is evaluated to produce not on a gallon but on a unit of energy, one mega jewel of energy which is 948 btu’s. When you look at the carbon and energy to produce this unit of ethanol over gasoline and the efficiency increases that are possible, this offers a 60 percent + reduction to carbon and over twice as efficient then gasoline to produce and use.