Oh my God. These idiots are trying to tie Gore-bull warming to the Permian extinction event. That event had NOTHING to do with life-generated CO2; it was primarily vulcanism, from what I remember from extensive reading back when I was really interested in this.
Geologists associate the great Permian extinction with the Siberian Traps volcanism that spewed out 1.5 million times as much lava and associated nasty gases as Mt. St. Helen's.