The world is about to end, or at least that’s according to ABC’s “Good Morning America.” The June 2 segment promoted a new special called “Earth 2100.” The program follows Lucy, a girl born in 2009, and her dramatic story about how if we don’t take drastic measures immediately climate change will cause droughts, floods, mass migration, and starvation. This may sound straight from a science-fiction movie, but “Good Morning America” went to great lengths to assure viewers this wasn’t science fiction and that by airing this series they were changing journalism. Bob Woodruff, host of the special, called making...