That happened years ago. But the slow wheels turn purposely slow.

As John Schellnhuber, one of the biggest European climate scientists that has been part of the majority of IPCCs, said last year about COP:

“Wenn die Länder die Klimaziele nicht umsetzen, sind diese Konferenzen nur Jahrmärkte der Eitelkeit.”

Translation by Google:

“If countries do not implement the climate targets, these conferences will be nothing more than vanity fairs.”

Interview, where he said it, and also said that 3 degrees above pre industrial would mean the end of modern human civilization (in German):

Youtube