So you agree mass extinctions happen when CO2 levels rise? Maybe...

So you agree mass extinctions happen when CO2 levels rise? Maybe we should make CO2 levels rise by burning fossils?

From the paper you quote:

The peaks of the 15-My CO₂ cycle identified here coincide closely with peaks of identified mass extinctions [88]: of 14 such CO₂ peaks from 225 to 0 Mybp (Figure 11), 12 match closely with peaks in identified mass extinctions and six of these 12 peaks coincide precisely with the peaks of identified mass extinctions (cf. Figure 11 with [88] (Figure 1, p. 135).