Biogas is considered an ideal fuel for domestic use because:
(a) Biogas burns without smoke and hence does not cause air pollution.
(b) Biogas has a high calorific value. That is, biogas produces a large amount of heat per unit mass.
(c) Biogas is cheaper than most common fuels.
(d) Biogas is a clean fuel since it burns completely without leaving any residue behind.
