Which one of the following forms of energy leads to least environmental pollution in the process of its harnessing and utilisation ?

Options

A. Nuclear energy
B. Thermal energy
C. Solar energy
D. Geo-thermal energy

Answer

C

Explanation

Solar energy leads to least environmental pollution in the process of its harnessing and utilisation.
In case of nuclear energy, the major concerns of pollution are mainly storage and disposal of spent fuels where there is always a risk of leakage of radiation.
In case of thermal energy, enormous amount of air pollution is produced. Even in case of geothermal energy, a little amount of pollution is produced.