Professor Gad-el-Hak has been asked in the follow-up comments to defend his assertion: "The accelerated Earth warming predicted in 1990 was right on the mark when 2000 and 2010 rolled along."
Read Professor Gad-el-Hak's whole piece.
Con: "Earth is never in equilibrium", by Richard S. Lindzen, PhD, Alfred P. Sloan professor of meteorology, Dept. of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, Massachusetts, U.S.A.
"The IPCC claim that most of the recent warming (since the 1950s) is due to man assumed that current models adequately accounted for natural internal variability. The failure of these models to anticipate the fact that there has been no statistically significant warming for the past 14 years or so contradicts this assumption."
Read Professor Lindzen's whole piece.