UN environment agency calls for urgent action on ‘triple planetary crisis’.

3 degrees would mean a cascade failure and after that point is purely game over for us and good luck to whatever is lighter than 25 kg and can survive in the ensuing thousand years of hell scape.

But no worries, last time it only took 1.3 million years for Earth to recover. So whatever emerges again from the caves will dubiously be able to call itself human.