Mention any two advantages and two disadvantages of producing hydroelectricity by building dams on rivers.
Answer:
Advantages:
- The generation of electricity from water does not produce any environmental pollution.
- Water energy is a renewable source of electric energy which will never get exhausted.
Disadvantages:
- A vast variety of flora and fauna (plants and animals) get affected.
- Dams can be constructed only at a limited number of places.