Gobar gas or biogas is mainly composed of methane (\\\\(50-70\\%\\\\)), \\\\(CO_2\\\\) (\\\\(30-40\\%\\\\)) and small amounts of \\\\(H_2\\\\), \\\\(N_2\\\\) and \\\\(H_2S\\\\). This is a fuel gas produced by metanogenic bacteria by anaerobic breakdown of biomass.