A class of liquid chemicals that have certain combinations of hydrogen, carbon and oxygen, and that are capable of being used as fuel.

Liquid chemicals made from renewable resources such as locally grown crops and even waste products. They contain a certain combination of hydrogen, carbon and oxygen that qualifies them as fuels. Methanol and ethanol are two types of alcohol fuels used in cars. (SOURCE: California Energy Commission, http://www.consumerenergycenter.org)