“how even a small nuclear war could destroy all life on earth”
That is nonsense, so I won’t bother watching it.
I’m skeered.
Ditto
“That is nonsense, so I won’t bother watching it.”
You’re correct. From Wikipedia:
“As of 1993, worldwide, 520 atmospheric nuclear explosions (including 8 underwater) have been conducted with a total yield of 545 megaton (Mt): 217 Mt from pure fission and 328 Mt from bombs using fusion, “
It depends on your definition of “small nuclear war”. It would most likely start with a nuclear EMP attack that would destroy the electrical infrastructure and the computers in all modern cars and truck. It eventually wipe out 80-90% of the population.
Read “One Second After” by William R. Forschen for a chilling read about a nuclear EMP.
The guy’s big on global warming too... I’m giving it a pass.