It's tough to believe in because it's not happening.
"In a 1999 e-mail exchange about charts showing climate patterns over the last two millenniums, Phil Jones, a longtime climate researcher at the East Anglia Climate Research Unit, said he had used a “trick” employed by another scientist, Michael Mann, to “hide the decline” in temperatures."
http://www.nytimes.com/2009/11/21/science/.../21climate.html