You searched for: “biofuel
biofuel, biomass fuel
1. A solid, liquid, or gaseous fuel that is obtained from biological raw material; the conversion is accomplished through thermochemical or biological methods.
2. Gas such as methane or liquid fuel such as ethanol (ethyl alcohol) made from organic waste material, usually by microbial action.
3. A renewable fuel, e.g., biodiesel, biogas, and methane, that is derived from biological matter.