This is what is laughable. The original IPCC report on global warming predicted an average rate of global mean sea level rise of about 6 cm per decade. The reality? 11 mm or less over the last 2 decades! That's over a factor of 100 miss. Nobody seems to notice how the goal posts on this issue are constantly moving. In the end, yes, there is global warming, but it is not even close to what was predicted in the late 1980s and early 1990s.
http://en.wikipedia.org/wiki/IPCC_First_Assessment_Report