Tipping point has tipped?
The one I remember scaring the hell out of everyone is the permafrost melt.
Thaw out enough permafrost and it releases enough greenhouse gasses to self perpetuate. No human interaction required.
https://www.space.com/methane-beneath-arctic-permafrost-climate-feedback-loop
I don’t even, I can’t even…
https://youtu.be/dMqWTkgDt6A
Good news gamers, it only works if you sleep alone!