Climate hoax promoter Michael Mann: For he's a jolly bad Fellow

Penn State scientists elected to American Geophysical Union

In the late 1990s, Mann with colleagues published the "hockey stick" graph of Northern Hemisphere temperatures over the past millennium. Based upon so-called "proxy" climate records such as ice cores, tree rings and corals, the graph demonstrates significant global warming in the last century. The graph, which has become a lightning rod for climate-change deniers, and the ensuing controversy are the subject of Mann's soon-to-be-released book, "The Hockey Stick and the Climate Wars: Dispatches From the Front Lines."