Question

What are the disadvantages of constructing dams for hydroelectric power station?

Answer 1

The environmental consequences of hydropower are related to interventions in nature due to damming of water, changed water flow and the construction of roads and power lines. Hydroelectric power plants may affect fish is a complex interaction between numerous physical and biological factors

click the brain if   helpful

Answer 2

Answer:     It creates  the problem of satisfactory rehabilitation of displaced people.

• Explanation:  constructions of big dams have certain problems associated with it :
• The dams can be constructed only in a limited number of places preferably in hilly terrains.
• Large areas of agricultural land and human  habitation are to be sacrificed as they get submerged.
• Large eco-systems  are destroyed when submerged under the water in dams.
• The vegetation  which is submerged rots under anaerobic conditions and gives rise to  large amounts of methane which is also a green-house gas.