On par with Hitler, Stalin, Mao, etc.
Via Climate Depot:
“Climate Ethics” Prof. Donald Brown of Penn State University declared that skeptics may be guilty of a “new crime against humanity” for causing a 25 year delay in acting to stop climate change.
Brown, who appeared alongside Climategate professor Michael Mann at a Penn State forum on April 30, 2012, slammed what he termed the “disinformation campaign.”
Watch Video of Brown and Mann here. (Brown’s comments on Climate Depot begin around 23:00 and his “new crimes against humanity” remark are around 24:50 mark)