Trees contribute to global warming?? Anybody else heard about this?

global warming IS a scare tactic. it is a natural occurence that cannot be prevented. mother nature will do as she pleases. there have been 15 ice ages in recorded geological history. one as recent as a couple hundred years ago.. this is just a tactic by the extreme wacko leftist environmentalists to try and disrupt industry. now i'm not saying we shouldn't do what we can to cut pollution or find alternate fuels... but, i'm really against people like gore just trying to make money by scaring people. or just because they're against corporations.