Now analyze the consequences to Ozone from atmospheric nuclear detonations with mushroom clouds billowing up into this stratosphere.
I think it is 5 kilotons of Nitric oxide per megaton of explosive yield.
NO + O3 --> NO2 + O2
NO2 + O --> NO + O2
net O + O3 --> 2O2
Enough tonnage was detonated to destroy every molecule of Ozone 4x over in this catalytic reaction.
One way to mitigate the damage might be to crack down on Nitric oxide emissions from automobiles, to ban chlorofluorocarbons (and pin it on them), and even to spray reflective particles into the air to give UV a second pass through the stratosphere in an attempt to replenish the Ozone faster via the natural process.
Do you suppose nuclear powers would have liabilities for cooking off the Ozone? Is this why they no longer do atmospheric tests?