There is no scenario where climate change leads to human extinction.
Worst case scenario is global population goes down by a single digit percentage. Horrible, horrible stuff, but not extinction. And most likely scenarios are not nearly that bad.
Nuclear war, if the worst nuclear winter predictions are correct, could be a lot worse but there would still be some survivors.
Unaligned ASI though, could actually make us extinct.
Nuclear war, if the worst nuclear winter predictions are correct, could be a lot worse but there would still be some survivors.
Unaligned ASI though, could actually make us extinct.