What if Global Nuclear War Occurred? || Science

Nuclear Weapons - A nuclear weapon ( also called an atom bomb, nuke, atomic bomb, nuclear warhead, A- bomb or nuclear bomb) is an explosive device that deserve its destructive force from nuclear reactions, either fission ( fission bomb ) or from a combination of fission and fusion reactions (thermonuclear bomb).

On 6th August 1945, America dropped two nuclear bombs over Hiroshima and Nagasaki. More then 128,000 people died & even more got injured. 

Today we have over 15,000 Nuclear Weapons. America has 6,600 Nuclear weapons and Russia has 6,800 Nuclear Weapons. So, What if a Global Nuclear War Occurred?

Just within few months of war...more than 1.8 Billion people will die. But that is just beginning...As result of these explosions... Dark clowds will cover Earth for 100's of years & block sunlight from reaching us due to which surface temperature will decrease & start a Nuclear winter and no one will survive that Nuclear winter.

~αтυℓ вσүℓℓα~