Apocalyptic climate-change predictions were box-office gold for Hollywood but they did untold damage to the public psyche, economy and the average man’s pocketbook. Now the United Nations’ influential climate change committee has quietly discarded the dire temperature-rise scenarios used in two previous reports predicting horrific consequences of global warming if greenhouse emissions weren’t curbed. For years, lefty outfits — based on dubious climate science — screamed about the coming climate catastrophe: The New York Times warned that “Climate Change Is Harming The Planet Faster Than We Can Adapt,” “Climate Change Is Speeding Toward Catastrophe” and “A Hotter Future Is Certain.”...