(i) Biomass is a renewable source of energy only if we plant trees in a planned manner which is not the case with hydroelectricity.
(ii) The energy from bio-mass can be obtained by using a chulha or a gobar gas plant whereas hydroelectricity requires construction of dams on rivers.
(iii) Biomass provides pollution-free energy only, when converted into bio-gas whereas hydroelectricity.
is totally pollution-fi'ee.
