In Michael Crichton's novel "State of Fear," he presents the theory that the Media wants to keep us all in a strict state of fear, hence the title of the book. He shows how the theory of Global Warming was revealed shortly (within a month) after the end of the Cold War. If the Cold War is over, what can the media keep the world in a State of Fear about? Cue Global Warming. Hell, I think when we're all gone, our ancestors won't even be hearing abotu Global Warming. They'll be hearing about the next big Media Stunt. Aliens on a collision course with earth, or some bullshit like that.
Of course, no matter what I say, I can't stop people set on Global Warming to stop believing in it. It's more like a faith, a huge emotion, then scientific fact or logic anymore.