The term biofuel is used in different ways. One definition is "Biofuels are biobased products, in solid, liquid, or gaseous … See more

Biologically produced alcohols, most commonly ethanol, and less commonly propanol and butanol, are produced by the action of microorganisms and enzymes through the fermentation of sugars or starches (e… See more

Algae can be produced in ponds or tanks on land, and out at sea. Algal fuels have high yields, a high ignition point, can be grown with minimal impact on fresh water resources, can be produced using saline water and … See more