Question

What are drawbacks of dams?

Answer 1

They block fish migrations
They create large bodies of stagnant water
They initiate human displacement
They involve lots of cost in production and maintenance
They hamper natural ecosystem

Answer 2

1-Increases the possibilities of flood.
2-The cost of construction  is very high.
3-It takes decades of years to construct a dam.
4-A huge loss of land area.
5-Very bad impact on aquatic life.
6-As the flow of river is affected by the dam so wild life also gets affected