claim: As it happens, the writer of that October 2009 e-mail—Kevin Trenberth, a lead author of the warmist bible, the 2007 Intergovernmental Panel on Climate Change ( IPCC ) report—told Congress two years ago that evidence for manmade warming is unequivocal.
evidence: He was a lead author of the 2001 and 2007 IPCC Scientific Assessment of Climate Change ( see IPCC Fourth Assessment Report ) and serves on the Scientific Steering Group for the Climate Variability and Predictability ( CLIVAR ) program.