Some scientists have predicted that a global nuclear war on the earth would be followed by a severe 'nuclear winter' with a devastating effect on life on earth. What might be the basis of this prediction ?

Explanation

Due to nuclear world war, highly energetic explosions would take place on Earth and so its majority area would get covered by the huge clouds and then solar radiations would not reach Earth.s surface and then temperature on the surface of Earth would fall considerably and then we would have ..Nuclear Winter.. which would destroy entire human life !!!