Why is biogas considered an excellent fuel?

Carefully observe the given diagram/chart and answer the questions based on it. Why is biogas considered as an excellent fuel ?

Answer the following questions on the basis of the diagram of a biogas plant gven below: (a) What is biomass? How is biogas obtained from biomass? (b) Why is biogas considered an ideal fuell ? "Biogas plant is a boon to farmers." Why? (c) Name the parts labelled A, B , and C in the diagram.

Why is biogas considered an ideal fuel for domestic use ?

Why is biogas considered to be an ideal fuels ? Give four reasons.

The constituent of biogas which makes it an excellent fuel is :