The difference between evolution and climatology is the difference between history and speculation. With evolution, you can literally trace evolution through t

The difference between evolution and climatology is the difference between history and speculation. With evolution, you can literally trace evolution through time using geo-dating and carbon dating as fossils change shape. No "real" scientists argue against it (there are religious "scientists" that do though). The impacts of AGW are still mostly speculation. We do not have a huge amount of accurate data from the past (most of our weather records go back only a few centuries, which is meaningless on a geological timescale). There are many real scientists that are skeptical about the effects of AGW (again, the link: http://en.wikipedia.org/wiki/List_of_scientists_opposing_the_mainstream_scientific_assessment_of_global_warming http://en.wikipedia.org/wiki/List_of_scientists_opposing_the...). AGW is mostly about projections - so far, none of the catastrophic effects of global warming have been seen on any significant scale.