The three sources ofenergg mosty used in India for commercial purposes in factories are
(i) Electricity It is the most useful and convenient source of energy in India. There are three main sources of electricity i.e, thermal, hydro and atomic power.
(ii) Petroleum It is one of the important source of energy in India. India produces about 3 lakh tonnes of petrol against the demand of 34 lakh tonnes. The country imports 31 lakh tonnes.
(iii) Coal It is primary source of energy and accounts for 54 % of total energy consumption.