Sweetie, have you heard of a gas called carbon dioxide? Did you know that it stores energy in its molecular structure? So the more CO2 in the atmosphere the hotter it gets?

252 million years ago the Siberian flood basalt out gassed enough CO2 to take concentrations to 3000 ppm. A flood basalt produces a large amount of CO2. It's a different kind of volcano from the Hawaiian kind.

95% of all life, in the sea or on land, died.

It took 20 million years for the Earth to recover. For most of that time there were about 6 species around.

Let's not go back to that, eh?