[Lurkinanloomin]

Complete and Utter Bull Sh!t

CO2 is plant food.
More CO2, more plants.
Formerly arid places are greening up.

Meteors cause mass extinctions.

[DannyTN]

So the CO2 feeds plants, and the plants get uppitdy, and suddenly you get....

[DuncanWaring]

Meteors, and lack of sunspots.