S. Fred Singer, professor emeritus of environmental sciences at the University of Virginia, a distinguished research professor at George Mason University, and president of the Science and Environmental Policy Project, gave a speech at Hillsdale College in August of 2007. Printed in their periodical Imprimus (with some rather irritating misplaced hypens in the on-line version), I strongly recommend it to you. It's on the topic of Anthropogenic Global Warming, or the lack thereof, and entitled Global Warming: Man-Made or Natural? Excerpt:
What about the fact—as cited by, among others, those who produced the IPCC report—that every major greenhouse computer model (there are two dozen or so) shows a large temperature increase due to human burning of fossil fuels? Fortunately, there is a scientific way of testing these models to see whether current warming is due to a man-made greenhouse effect. It involves comparing the actual or observed pattern of warming with the warming pattern predicted by or calculated from the models. Essentially, we try to see if the "fingerprints" match—"fingerprints" meaning the rates of warming at different latitudes and altitudes.And this:
For instance, theoretically, greenhouse warming in the tropics should register at increasingly high rates as one moves from the surface of the earth up into the atmosphere, peaking at about six miles above the earth's surface. At that point, the level should be greater than at the surface by about a factor of three and quite pronounced, according to all the computer models. In reality, however, there is no increase at all. In fact, the data from balloon-borne radiosondes show the very opposite: a slight decrease in warming over the equator.
The fact that the observed and predicted patterns of warming don’t match indicates that the man-made greenhouse contribution to current temperature change is insignificant. This fact emerges from data and graphs collected in the Climate Change Science Program Re-port 1.1, published by the federal government in April 2006 (see www.climatescience.gov/Library/sap/sap1-1/finalreport/default.htm). It is remarkable and puzzling that few have noticed this disparity between observed and predicted patterns of warming and drawn the obvious scientific conclusion.
You will note that this has been a rational discussion. We asked the important question of whether there is appreciable man-made warming today. We presented evidence that indicates there is not, thereby suggesting that attempts by governments to control green-house-gas emissions are pointless and unwise. Nevertheless, we have state governors calling for CO2 emissions limits on cars; we have city mayors calling for mandatory CO2 controls; we have the Supreme Court declaring CO2 a pollutant that may have to be regulated; we have every industrialized nation (with the exception of the U.S. and Australia) signed on to the Kyoto Protocol; and we have ongoing international demands for even more stringent controls when Kyoto expires in 2012. What's going on here?What, indeed?
Read the whole thing, and the piece where I found the link in comments.