The construction of large dams is opposed because –

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Natural imbalances arise. The disadvantages of building large dams are: Damming of rivers and regulating their flow result in excessive sedimentation at the bottom of the reservoir. This may endanger aquatic life and their migration to other water bodies. Building of dams result in the submergence of land and vegetation. This results in the decomposition of vegetation. Construction of large dams result in the displacement of villagers and communities. The villagers have to give up their lands and their means of livelihood. Large forest areas are also submerged because of the building of dams. This threatens our biodiversity.

The construction of large dams is opposed because –

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