"John Connor of The Climate Institute says that my boat, my car and I are destroying the environment. My work says the opposite. The more carbon dioxide you put into the atmosphere, the more you are helping all plants on the planet to grow, and of course that makes you a better person. Virtue is in direct proportion to your carbon dioxide output. What of the temperature, you ask? Carbon dioxide is a greenhouse gas, but the effect is strongly logarithmic. The first 20 ppm achieves 1.5 degrees of heating, but it takes more than another 400 ppm to equal that. By the time we get to the current level of 384 ppm, carbon dioxide is tuckered out as a greenhouse gas. From here, every 100 ppm extra may be worth 0.1 of a degree.
So how does the IPCC achieve 5 degrees of heating from a doubling of the pre-industrial level of carbon dioxide to 560 ppm? They do it by cheating. Their computer models are written so that a little bit of carbon dioxide-caused heating puts more water vapour in the air. Water vapour is the major greenhouse gas, so they have the heating compounding away until they get a number that will melt icecaps, kill polar bears and all the other effects of their apocalyptic visions. Their view of the Earth’s climate is that it is tremendously unstable, prone to thermal runaway at the slightest provocation. In fact it is the opposite, a buffered system that dampens disturbances. Tropical seas can’t get warmer than 31 degrees because they start evaporating too rapidly to get any hotter. Similarly, high level tropical clouds part to vent radiation to space. The Earth is just about perfect for sustaining equable living conditions over a good proportion of its surface."
Read the whole thing of course.