Three months after its publication, this article by Graham Readfearn is still very sharp, and a great reference for all your charming debates with science denyers. I and other authors here at MLH will repeat it forever: the IPCC, by and large, has produced very accurate reports that almost always underestimate how soon tangible changes to our climate will be measured. It seems with each report, changes predicted in the last report have already become a proven reality, years ahead of original predictions.

Graham Readfearn via The Guardian: The hellish monotony of 25 years of IPCC climate change warnings