Geological time scale shows cascade of extinctions following CO2 drop-offs

Geological records show correlation between falling CO2 levels and mass extinction events
newstarget.com

Geological records show correlation between falling CO2 levels and mass extinction events

The geological time scale (GTS) contains certain eras where CO2 levels were historically high due to thriving plant life, and also contains periods where CO2 levels were catastrophically low, which correlate with mass extinction events and the inabil