Bioethanol refers to ethanol liquid which is made from common crops including sugar cane and corn. It is considered an alternative to petroleum and diesel and its popularity is emerging as a fuel for cars, it is particularly well established in Brazil.

Production of bioethanol involves the conversion of a feedstock crop into fermentable sugars through enzyme amylases. Yeast is then added to ferment the sugars into alcohol and carbon dioxide. The main crop used in bioethanol production varies throughout the world – in Brazil, sugar cane is preferred, in the USA its corn and across Europe it’s predominantly wheat and barley