In 2012, global warming is virtually undeniable. A cause strongly championed by Al Gore in his 2007 documentary An Inconvenient Truth, it is now catalogued by National Geographic, certified by NASA, and tracked by the National Oceanic and Atmospheric Administration. But there remain many non-believers, and they were thrust into the spotlight again this week when former SNL star Victoria Jackson called global warming “false science” on The Howard Stern Show. She is just one of the celebrities who continue to deny the phenomenon that science supports.

