That happened. It is no longer plausible for us to hold temperatures to 1.5C, which means that we will lose the polar ice cap, and greenland will slowly melt. The weather in the Northern hemisphere will consequently become chaotic and unlike any weather since we developed agriculture.

The thing everyone misinterprets is that there is no hard threshold beyond which things cannot get any worse. Even though the warming that is now locked in was considered the end of the world before, and will have catastrophic effects on the world, it is still worth fighting to keep it from getting even worse.

The worst case scenarios from a "business as usual" rate of emissions growth would in a few hundred years have mankind isolated to a few extremes of latitude as the only places left where the outdoor temperatures won't kill us.

https://www.nybooks.com/articles/2020/08/20/climate-emergenc...