list two advantages of using biogas over fossil fuel

i) Biogas is produced by the breakdown of sewage or waste organic matter in anarobic tanks. Hence it is produced from waste matter as a byproduct, hence it is non renewable. Fossil fuels are renewable sources of energy which are fast depleting.

ii) Biogas produces much lesser pollution or exhaust gases as compared to fossil fuels on burning. Hence it is a much cleaner fuel.