Shout out to my husband for remembering that this video existed:
Don't worry - Newt is not going to sabotage his campaign by doing something so stupid as to believe in scientific thingys when there's a perfectly good conspiracy theory to be had. Conspiracy theories work much better when you are trying to connect with today's Republican base. Today, Newt is worried about United Nations Agenda 21 and what that means for Americans. If you already believe that the United Nations is a shadowy organization that is hell-bent on the destruction of the United States, then the fact that they weighed in on climate change in 1992 is especially troublesome (assuming your premise is true).
So, Newt was in favor of action on climate change, and now that type of action is part of a global conspiracy. The Republican Primary just gets weirder and weirder every day.