Professor Don Easterbrook on The Looming Threat of Global Cooling

Professor of Geology Dr. Don Easterbrook's essay, The Looming Threat of Global Cooling, predicts on the basis of natural climate cycles such as the PDO that "global cooling for the next 2 to 3 decades will be far more damaging than global warming would have been." The paper also finds there were numerous, abrupt, short-lived warming and cooling episodes, much more intense than recent warming/cooling, during the last ice age, none of which could have been caused by changes in atmospheric CO2: