Question
What are the problems associated with hydroelectric power plant?

Answer

(i) The back water due to storage of water in dam may submerge villages or towns in that area
(ii) This leads to the problems of re-habilitation of the displaced population, More ever this can also submerge forests as well as fertile land.
(iii) The obstruction of the flow of river water may have adverse effects the river on living world in water in river.

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