justin bieber 2011 new haircutbryancAug 29, 01:55 PM... The other 90%+ of the greenhouse effect (the REAL reason the Earth's climate is warming) is caused by....drum roll....naturally occuring water vapor! ... Let's also not forget that 30 years ago (when manmade pollution was FAR worse than it is today) these same people were warning us of a coming Ice Age. I didn't know we had a climate