Via Daily Caller: Last year, Fox Business host John Stossel asked about a dozen climate scientists to debate skeptic Dr. Roy Spencer, a former NASA scientist who now teaches at the University of Alabama. -- Stossel also asked the environmental group the Union of Concerned Scientists if they would debate Spencer on TV. Stossel said UCS replied that debating Spencer "would be doing the public a disservice because it would give [his] extreme ideas credibility." NASA Goddard Institute for Space Studies climate scientist Gavin Schmidt did go on that episode but only after Spencer was no longer on the set.