Extrapolations are inaccurate. It is a family of curves. There are some that tell us that by 2035 we might get +4°C (I hope that this will not happen). But even

Extrapolations are inaccurate. It is a family of curves. There are some that tell us that by 2035 we might get +4°C (I hope that this will not happen). But even if we will reach +4°C by 2050, by some less pessimistic models then the environment for human existence will be doomed. Unfortunately at some point there will be exponential changes in methane increase in the atmosphere due to the melting of permafrost and methane-hydrates in the oceans. This was already a case once approximately 55 million years ago https://www.britannica.com/science/Paleocene-Eocene-Thermal-Maximum https://www.britannica.com/science/Paleocene-Eocene-Thermal-... The recovery took like 120k-200k years. The ecosystems were replaced ... Unfortunately there are a little chances that the Antarctica will be green again, because there probably no fertile soil left (scraped by the ice shield shifts and melting). The idea of building an ark in NZ, Norway, Alaska, Greenland, or elsewhere will not help the humanity to survive.