Global warming was invented by Green Peace...
... so that hippies would donate money to fund efforts. Look at the global average tempature, and not the bull crap numbers Green Peace (hereby refered to as GP) gives you which only look at urban areas where the tempature increases due to direct human activity, but the global temperature which has dropped a few degrees since the 80's.
Heck, overall for the past 20 years the ice caps have been melting, but in the past five years they've been growing at an accelerated rate.
There is a book called "State of Fear" by Micheal Crichton. Read it.