> "Well, the rate at which we're injecting CO_2 into the atmosphere today, according to our best estimates, is ten times faster than it was during the End-Permi

> "Well, the rate at which we're injecting CO_2 into the atmosphere today, according to our best estimates, is ten times faster than it was during the End-Permian. And rates matter. So today we're creating a very difficult environment for life to adapt, and we're imposing that change maybe ten times faster than the worst events in Earth's history". Geologist here! That's a good quote. On geologic timescales, a million years is short! Accordingly, a lot of our effects on the environment are scary more because of their rate than their absolute magnitude (so far). I think humanity as a species has been doing a pretty good job of implementing that old facebook motto "move fast and break things". We'll see how that works out for us.