I am not a climate scientists, but like many others I have a position on global warming. My position is that of a lukewarmer. I believe that significant increases in carbon dioxide lead to increases in temperature. I just don’t believe those increases in carbon dioxide lead to the dangerous amount of global warming that most global warming alarmists assert. In other words, emissions of carbon dioxide lead to some global warming, just not dangerous amounts of such warming.
The main reason for my belief is that the alarmist argument does not rest simply on carbon dioxide leading to increases in warming. Instead, the degree of warming asserted by alarmists involves much larger secondary effects – secondary effects, such as the claim that the initial degree of warming from carbon dioxide leads to additional warming from things like increased water vapor. While the scientific case for the claim that carbon dioxide increases temperatures is strong, the scientific case for the much larger secondary effects is, to put it mildly, much weaker.
For an excellent discussion of the Lukewarmer position and for a variety of interesting aspects of the global warming debate, see this podcast with Matt Ridley at Econtalk, one of our sister sites.