Biogas is product by the anaerobic digestion or fermentation of biodegradable material such as biomass, manure, sewage, municipal waste, green waste, plant material and crops. The gas mainly consists of methane and carbon dioxide,

Biomass is biological material derived from living or recently living organism i.e. plant or animal. Mainly three type of biomass technologies, improved, cook stove (ICS), briquette and bio-fuel technology are in use within the country.