What if we detonated 100 nuclear warheads?

What if humanity detonated 100 nuclear warheads? - Correction from the author of one of the papers cited on this video Prof. Alan Robock (Rutgers University): “For our 100-weapon India-Pakistan scenario, the global cooling would be less than 2°C, but as you point out it would destroy ozone and perhaps cause famine for many people. But to get global average cooling of 10°C would require all the deployed US and Russian weapons, 4000 of them, to be used. This would indeed produce nuclear winter.”