USA Today: "What we’re trying to get across in the documentary is that there’s a growing consensus that global warming is real and getting worse," Brokaw says in a telephone interview. He says the show presents a "playbook" of the scientific effects of warming. The documentary examines the changes that are expected in the USA and around the world over the next several years and decades, including ice loss from Greenland and Antarctica, extreme weather and species loss. "What I’m …