Comment by hunter on Nuclear war is unlikely to cause human extinction · 2020-11-13T15:26:34.195Z · LW · GW

Have you considered if human extinction could be brought about with something like cobalt bombs? https://en.wikipedia.org/wiki/Cobalt_bomb

As far as I know these aren't in anyone's arsenal. But if you have a nuke, making a cobalt bomb is trivial.