We the undersigned, qualified in climate-related matters, wish to state that current scientific knowledge does not substantiate your assertions.Read their whole letter here. Just to pick one point that they make:
The U.K. Met Office recently released data showing that there has been no statistically significant global warming for almost 16 years.... The NOAA “State of the Climate in 2008” report asserted that 15 years or more without any statistically-significant warming would indicate a discrepancy between observation and prediction. Sixteen years without warming have therefore now proven that the models are wrong by their creators’ own criterion.CO2 is a greenhouse and human-caused emissions of it should cause warmer temperatures. Global warmists, however, take that a step further and claim that man-made CO2 has a dominating effect on the environment. There is no evidence to support that claim.
Scientists who signed this letter include such notables as William M. Gray, who is often referred to as the father of seasonal hurricane forecasting, and Princeton Physics Professor William Happer.