The global annual potential bioethanol production from the major crops, corn, barley, oat, rice, wheat, sorghum, and sugar
cane, is estimated. To avoid con/icts between human food use and industrial use of crops, only the wasted crop, which is
de0ned as crop lost in distribution, is considered as feedstock. Lignocellulosic biomass such as crop residues and sugar cane
bagasse are included in feedstock for producing bioethanol as well. There are about 73:9 Tg ofdry wasted crops in the world
that could potentially produce 49:1 GL year−1 ofbioethanol.