Looks like this fern fixed it last time? So no worries then. Might take a while...
https://en.m.wikipedia.org/wiki/Azolla_event
https://www.washingtonpost.com/news/energy-environment/wp/20...
Apparently the worst case scenarios mentioned here were used as a focus during the Paris accords.
But Paris Climate Accord are now dated, 2017 report from IPCC says the 2°C objective has already failed and we're heading for a 3 to 5°C average global temperature increase whatever we do by the end of the century, such a global average increase translate into a 6 to 10°C average continental temperature increase. With a 6 to 10°C temperature increase no known agriculture is possible.