Ethanol also known as ethyl alcohol or grain alcohol, can be used either as an alternative fuel or as an octane-boosting, pollution-reducing additive to gasoline. Corn and other starches and sugars are only a small fraction of biomass that can be used to make ethanol. Advanced bioethanol technology allows fuel ethanol to be made from cellulosic (plant fiber) biomass, such as agricultural forestry residues, industrial waste, material in municipal solid waste, trees and grasses.