sorghum, grain sorghum, switchgrass, barley, hemp, kenaf, potatoes, sweet potatoes, cassava, sunflower, fruit, molasses, whey or skim milk, corn, stover, grain, wheat, wood, paper, straw, cotton, other biomass, as well as many types of cellulose waste. as of , production is primarily from sugarcane, maize
soil fertility due to reduction of organic matter. about % (in ) of the ethanol produced in the world is actually a petroleum product. it is made by the catalytic hydration of ethylene with sulfuric acid as the catalyst. it can also be obtained via ethylene or acetylene, from calcium carbide, coal, oil...
http://www.biofuels.ru/bioethanol/what-is-bioethanol/