When a Penn State board of inquiry unilaterally decided that Michael Mann had broken no rules in the climate-data scandal, global-warming alarmists breathed a sigh of relief, thinking the most damaging episode in their effort to save the planet was behind them. They were wrong.
The geology professor’s 1998 climate study, which showed a sharp increase in the world’s temperatures in the past century, was seen by many as proof that climate change was rapidly occurring and that humans played a significant role in the change. Despite ongoing criticism, the study formed the backbone of global warming theories — until leaked e-mails cast fresh doubt on Mann’s methodology and integrity, notably “the trick” he used to make his data so compelling.
It was those e-mails, stolen from British university East Anglia’s climate study group, that sparked Penn State’s probe into Mann’s work. On Feb. 3, he was exonerated on three of four charges, and the investigation of the fourth charge will be concluded by June 3.