The way mass extinctions work is that the conditions that support the base of the food chain fail. Organisms that depend on the base then cease to exist. Multiple coextinctions then occur in mid-order seasonal species. /2

https://twitter.com/blueoceanarctic/status/1489631574635294728

As we are apex omnivores we will suddenly (as soon as this NH Spring) find that regional multispecies collapse will have rendered previously fertile regions barren. By midsummer CO2-e of over 660ppm will push mid-continental temps above 50°C. /3

This is the big one. It won't last long, but the instability that it unleashes will be devastating for (potentially) billions. Think of it as the snowball that triggers an avalanche. If you thought that the weather of the last couple of weeks was bad, wait...

https://twitter.com/chriscartw83/status/1417922623904915468

It is fair to say that a) this event marks the onset of the ravages of advanced climate breakdown, and that b) what we have created as a species is as good as it gets. The ravages will destroy infrastructure far, far faster than we can repair / replace...2