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Brokaw Has a Global Warming Warning

Since leaving the NBC Nightly News anchor chair in 2004, Tom Brokaw has been anything but "retired." As host of Global Warming: What You Need to Know (premiering Sunday at 9 pm/ET on Discovery Channel), the newsman posits some reasons for our planet's higher fever. TV Guide: Why'd you get involved with the documentary?Tom Brokaw: I've been watching [the issue] for some time, and like a lot of people I've been trying to figure out the difference between fact and fiction. The scientific consensus is now pretty overwhelming. There are still scientists out there who will be dismissive of it, but more and more are signing on. What's been so striking to me is that more