Question

Which of the following statements brings out a difference between hydroelectric power plants and thermal power plants?

• A. Hydroelectric power plants usually generate more electricity than thermal power plants.
• B. Hydroelectric power plants have less contribution to air pollution, while thermal power plants contribute immensely to air pollution.
• C. Unlike hydroelectric power plants, thermal power plants require sophisticated nuclear fusion technology.
• D. Thermal power plants are more efficient than hydroelectric power plants.

Answer 1

The correct option is B Hydroelectric power plants have less contribution to air pollution, while thermal power plants contribute immensely to air pollution.

Hydroelectric power plants usually use river water to generate electricity, owing to the construction of dams. This can cause flooding. On the other hand, thermal power plants convert heat energy to electricity by combustion of energy sources like coal. Thus, it contributes to air pollution by emitting gases like Carbon dioxide.