Question

advantages and disadvantages of hydroelectric power plant?

Answer 1

Advantages :
1) it is a very cheap source of energy
2) it is renewable 
3) it is pollution-free
Disadvantages :
1) it can be constructed only in limited number of places, preferably in hilly terrains
2) large area of agricultural land and human habitation are to be sacrificed as they get submerged
3) eco-system gets destroyed when submerged in water

Answer 2

ANSWER--

Advantages :
1) it is a very cheap source of energy
2) it is renewable 
3) it is pollution-free
4) it helps us to conserve fossil fuels as they may exhaust some day
5) it is used to control floods and is used for irrigation

Disadvantages :
1) it can be constructed only in limited number of places, preferably in hilly terrains
2) large area of agricultural land and human habitation are to be sacrificed as they get submerged
3) eco-system gets destroyed when submerged in water
4) large amount of methane, which is a green house gas, is produced due to submerged vegatation
​5) it creates the problem of satisfactory rehabilitation of displaced people