Current figures show that of the four main kinds of bioethanol, the energy return on energy invested (EROEI) of sugarcane alcohol is 8: 1 with a high CO2 reduction efficiency (90 %), with corn alcohol doing worst on both counts (1.5: 1 and 15 % -25 %).
目前的統計顯示，4 種主流生質酒精中，甘蔗酒精的能源產出／投入比（8 : 1）和 CO2 減量效益（90 %）較高，玉米酒精則在這二項（1.5 : 1；15 % ~ 25 %）皆敬陪末座。