>>523347
>55.8 million years ago
>A main difference is that during the PETM, the planet was ice-free, as the Drake Passage had not yet opened and the Central American Seaway had not yet closed.
>Model simulations of peak carbon addition to the ocean–atmosphere system during the PETM give a probable range of 0.3–1.7 petagrams of carbon per year (Pg C/yr), which is much slower than the currently observed rate of carbon emissions. One petagram of carbon is equivalent to a gigaton of carbon (GtC); the current rate of carbon injection into the atmosphere is over 10 GtC/yr, a rate much greater than the carbon injection rate that occurred during the PETM.

>>523375
Так всё и исследуется, но это никак не должно отменять или мешать переходу к экогородам с нулевыми выбросами.