Write the problems/disadvantages of hydroelectric power generation.

Explanation

(1) Many villages and settlements are submerged when a dam and reservoir is constructed. The displaced pebple are given resettlement, but it causes lot of emotional trauma to people.
(2) Biodiversity is affected as forest land is submerged. The river flow is obstructed by the dam which affects the aquatic organisms residing in such water.
(3) Due to excessive pressure of water on land, it is said that the region gets prone to earthquakes.