Though nuclear energy is an extensive source but the amount of electric power generation from nuclear power plants is much less.

Explanation

(i) The technology of nuclear power plant is highly expensive.
(ii) Similarly, the fuel Uranium required to run these plants is not available in all countries .
(iii) The fission products sometimes are radioactive and can cause environmental pollution.
(iv) Disposal of radioactive wastes from the nuclear power plat is much more difficult as it can cause health hazards.
(v) Therefore, these plants are used on a limited scale thus energy production is also less .