The major component of biogas is :

(a) What is biogas ? Name the major component of biogas. (b) What are the raw materials used for making biogas ? (c ) Describe the construction and working of a biogas plant with the help of a labelled diagram. (d) Write any two uses of biogas. (e) Write any two advantages of using biogas.

The major component of LPG is :

A major component of gobar gas is: