biofuel
fuel that is produced through contemporary biological processes, as opposed to fossil fuel that was produced by prehistoric bio-geological processes
dung cake
fuel source made from cow or buffalo dung
Cellulosic ethanol
type of biofuel
ethanol fuel
type of biofuel containing ethanol
algae fuel
alternative to fossil fuel that uses algae as its source of natural deposits
Seaweed fuel
fuel produced from seaweed
Biomass briquettes
Fuel source made from green waste