Biogas is a methane rich fuel gas produced by anaerobic breakdown or biomass with the help of methanogenic bacteria. It is composed of methane (50-70%), $CO_{2}$ (30-40%) and traces of hydrogen, nitrogen and hydrogen sulphide.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.