Biogas plants use a biological process called anaerobic digestion to convert organic waste into biogas. Anaerobic digestion is the process by which organic matter, including agricultural residues, food wastes, and manure, is broken down by microorganisms without the presence of oxygen. The resulting biogas is mainly composed of methane and carbon dioxide, and can be used for a variety of purposes, including cooking, heating, generating electricity, and even powering vehicles. The process also produces digestate, a nutrient-rich organic fertilizer. Biogas plants are environmentally friendly and help reduce waste and produce clean energy.