What is Biogas?mention the main constituent of biogas

What is Biogas? mention the main constituent of biogas.how is it considered as an ideal fuel…

Biogas is a gas produced by the biological breakdown of organic matter in the absence of oxygen.
It is a mixture of methane(65%), Carbon dioxide, hydrogen, hydrogen sulphide, etc.

Its considered an ideal fuel because:

  1. It burns without smoke and leaves no residue.
  2. Its heat capacity is high.
  3. Animal and food waste and sewage undergo natural anaerobic digestion in an oxygen-free environment.Therefore, biogas is included in the category of renewable energy sources because till humans and animals exist on the planet, biogas will go on being produced.