

Unless global heating is reduced to 1.2C
If we plateaued right now and did everything possible to draw CO2 out of the atmosphere and oceans, it would probably take a few thousand years to get back down. The reasoning - we weren’t the main CO2 contributor, we just were the extra catalyst to throw things off to begin the acceleration up. So now that things are off balance and feedbacks are kicking in, how can we reverse what we put into the environment AND counter the extra feedback outputs? It’s like trying to stop the boulder that was easy to push onto the hill slope.
If I recall right (and it may not be right lol) it was timing as well as how many other populations there were. I think the initial discovery and research made some assumptions that what they found was the only people around and that it was a sudden disaster. Just like now we think that the dinosaurs were already suffering for various reasons and the asteroid was just a final push towards extinction over time.