A. methane, carbon dioxide, nitrogen and hydrogen
B. carbon dioxide, nitrogen and hydrogen
C. ethane, carbon dioxide, nitrogen and hydrogen
D. methane, carbon dioxide, nitrogen and sulphur
Biogas differs from natural gas in that it is a renewable energy source produced biologically through anaerobic digestion rather than a fossil fuel produced by geological processes. Biogas is primarily composed of methane gas, carbon dioxide, and trace amounts of nitrogen, hydrogen, and carbon monoxide.
