Sources of Energy Used to Generate Electricity - Hydroelectric

The advantages of using hydroelectric as a source of energy to generate electricity are.
  1. It is a renewable energy.
  2. Building a dam does not pollute the environment.
  3. In a lot of country, water can be easily obtained and is free.
  4. Building a hydroelectric plant does not involve very high technology as nuclear power plant.

The disadvantages of using hydroelectric as a source of energy are.
  1. Building a dam will cause a large area flooded with water, and hence seriously destroys the ecosystem nearby.
  2. The flooded area causes the loss of wild life habitat and agriculture land.
  3. Dam failure happens will cause a disaster to the lower reaches area of the river.
  4. The cost to build a dam is very high.