CNN: The world's glaciers are disappearing. Climate change skeptics are not. The people who study our oceans and skies worry about both of these phenomena. But in wide swaths of 21st century America, the argument is still stuck on what to call the other side. "Denier" can also describe those who reject the Holocaust, so some who refuse to believe that human behavior is warming the planet prefer the label "skeptic." But scientists are de facto skeptics, and many resent that word being hijacked by...