List any three ways in which construction of dams for production of electricity adversely affects the environment of that place.
(i) Large areas of agricultural land and human habitation are to be sacrificed as they get submerged.
(ii) Large eco-systems are destroyed when submerged under the water in dams.
(iii) The vegetation which is submerged rots under anaerobic conditions and gives rise to large amounts of methane which is a green-house gas.
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