I don't follow you. You say that the heating up is caused by "100+ years of extraction of massive quantities of sequestered carbon from the Earth's crust and burning it now baked into the system" but at the same time you say humans, who did the extraction and burning for 100+ years, cannot stop doing it? I mean, reverting the temperature to pre-industrial level it's not going to happen soon in any case, but at least stopping increasing it constantly IT IS a human-achievable goal, by definition.