Big explosions, radiation sickness and a nuclear winter. It's best if we don't bother with all that imo.
All urban populations die. At least half of the rest die in the fallout and chaos.
All pharmaceutical, industry will cease production.
With the power stations destroyed and no easy access fossil fuel it will be back to the dark ages for the few, sick, survivors.
It's self-explanatory. Major cities would be damaged and millions of people would be killed. Overall, war results in carnage, dead bodies, and mass trauma.
the human race would be wiped out
it would be terrible for business
