What you believe is irrelevant. The science is "in", so to speak. There is no question within scientific circles about this.Even Richard Muller, a skeptic at one point, has conceded he was wrong.http://en.wikipedia.org/wiki/Richard_A._MullerWhen we began our study, we felt that skeptics had raised legitimate issues, and we didn't know what we'd find. Our results turned out to be close to those published by prior groups. We think that means that those groups had truly been very careful in their work, despite their inability to convince some skeptics of that. They managed to avoid bias in their data selection, homogenization and other corrections.Global warming is real....On July 28, 2012, he stated, "[G]lobal warming [is] real .... Humans are almost entirely the cause."