His other area of expertise was climatology, which he spoke about in no uncertain terms. “There isn’t a shred of evidence that human beings had any effect [on climate],” Dr. Mullis said in a 2010 lecture at Saddleback College in Mission Viejo, California. “Climatology has become kind of a joke. All those people meeting in Copenhagen and deciding that everybody needs to stop cooking over sterno stoves in Africa…those people don’t know nothing.”