If you chose to not to grind through the entire article , it points to about 170 nuclear weapons that Pakistan has pointed at India. India has a bunch pointed back at Pakistan. Neither has a NO FIRST USE POLICY. The two countries are in chronic scraps that could erupt into full scale war, Either slide could go nuclear. —Then both sides and possibly allies involved. Devastating for those on the receiving end.
The US, Russia and China are nuclear armed. There are threats implicit and explicit. Israel has more than 100. North Korea has a collection and delivery systems. The UK an Fance are nuclear powers and many ar parked all over Europe. What could go wrong?
Nuclear Winter could follow an exchange that strikes cities the sky would darken cooling the entire Northern Hemisphere and some of the Southern Hemisphere. Agriculture would slow for about 5years leading to widespread starvation
If you are unaware of Nuclear Winter watch Prof Brian Toon’s interesting and frightening podcast describing a grim future for our planet if there are many Nukes dropped on cities. https://futureoflife.org/podcast/brian-toon-on-nuclear-winter-asteroids-volcanos-and-the-future-of-humanity/