Bioethanol is an alcohol made by fermenting the sugar components of plant materials and it is made mostly from sugar and starch crops. With the development of next technology biofuels, cellulosic biomass, such as trees and grasses, are also used as feedstocks for ethanol production. Ethanol can be used as a fuel for vehicles in its pure form, but it is usually used as a gasoline additive to increase octane and improve vehicle emissions . Bioethanol is widely used in the USA and in Brazil.
For more info see:
1. Wikipedia Article on Bioethanol, http://en.wikipedia.org/wiki/Bioethanol#Bioalcohols
