What we should learn from history regarding #ClimateChange

“The PETM involved more than 5°C of warming in 15-20 thousand years (actually a little slower than rates of warming over the last 50 years), fueled by the input of more than 2000 gigatons (a gigaton is a billion tons!) of carbon into the atmosphere.”

Ancient #Climate Events: Paleocene Eocene Thermal Maximum

#PETM #extinction #FossilFuel
https://courses.ems.psu.edu/earth103/node/639