Actor Brad Pitt joined throngs of climatologists, meteorologists and other scientists in offering a forecastfor the future under the mantle of climate change. Spoiler alert: per Pitt, there is no future. Appearing on the debut onTuesday, Pitt closed out the episode bystanding infront of a map à labroadcast meteorologist and gave his dire prediction. (MORE:) "To help us understand climate change and what it means to the world, here's our own Jim Jeffries Show weatherman," Jefferies says before the camera...