Hydroelectricity accounts for what percentage of India's commercial energy use?
< 5%
10%
20%
30%
Hydroelectricity accounts for less than 5 percentage of India's commercial energy use.
'Commercial energy is mostly used for commercial purposes in factories, farms and commercial establishments'.
In the context of above statement, describe three sources of energy which are mostly used in India for commercial purposes in factories.
What percentage of India's commercial energy requirement is satisfied by coal?