I have degrees in Geology and Electrical Engineering, and worked on the design team of many of the world’s most complex designs, including some which likely power your PC or Mac. I have worked as a contract software developer on climate and weather models for the US government.
Tony Heller: "My position on global warming:
The claims of 97% consensus are a massive lie. Only 52% of American Meteorological Society members believe that man is the primary contributor to global warming.
The radiative transfer models used by government climate scientists show that going up to 550 PPM or even 1000 PPM CO2 will make minimal difference to the radiative balance of the atmosphere. The knee of the CO2 curve is at about 30 PPM, and additional CO2 has little first order effect. This is because almost all radiation in the CO2 absorption spectra is already being absorbed by H2O or CO2 molecules. Adding more CO2 has minimal effect, because there is not much radiation left to be absorbed. (This is a bit of an oversimplification because of second order effects, but those are also small.) There is no indication from the radiative transfer models used by government scientists that additional CO2 will cause large amounts of heating."