Description : For generation of biogas, the materials commonly used are — (1) Animal wastes (2) Crop residues (3) Aquatic plants (4) Forest residues
Last Answer : (1) Animal wastes Explanation: Biogas typically refers to a gas produced by breakdown of organic matter in the absence of oxygen. Organic waste such as dead plant and animal material, animal feces ... materials such as biomass, manure, sewage, municipal waste, green waste, plant material, and crops.