Anyone who has followed the climate change issue in the last 30 years knows that official forecasts provided by the Intergovernmental Panel on Climate Change (IPCC) are quickly upended by developments and have often been obsolete before they were issued. The latest report from the IPCC is the first, however, to abandon the measured tone of its previous ones and foretell what it considers a climate catastrophe for human civilization unless the world makes an abrupt U-turn and begins dramatic reductions in greenhouse gas emissions almost immediately. And yet, even this forecast is probably too conservative in its pronouncements. That’s according to Michael Mann , a climate researcher whose famous “hockey stick” graph has been central to understanding the rise in global temperatures and has been replicated again and again using other measures of historical worldwide temperatures . What is little understood by the public is that humans have […]