Prof Claims Climate-Denier Defamed Him

     VANCOUVER, B.C. (CN) - A Pennsylvania State University professor claims climate-change denier Timothy Ball defamed him in an interview published by the Frontier Centre for Public Policy, a Winnipeg-based think tank.
     Michael Mann, a professor in Penn State's meteorology department and director of the university's Earth Systems Science Center, claims that Ball defamed him when he said that Mann "should be in the State Pen, not Penn State," for his alleged role in the so-called climate gate email tussle.
     Mann says that Ball and the Centre refused to issue an apology and published the words with the "purpose of harming the plaintiff and exposing him to hatred, ridicule and contempt, lowering the plaintiff in the estimation of others, and causing him to be shunned and avoided."
     It's not the first time Ball's been sued by a climate scientist for defamation.
     In February, Andrew Weaver of the University of Victoria sued Ball over an article published by the Canada Free Press, in which Ball allegedly accused Weaver of cherry-picking scientific data in his work with the UN's intergovernmental Panel on Climate Change.Mann seeks punitive damages and wants the article removed from its electronic database. He is represented in B.C. Supreme Court by Roger McConchie.