Thought to be the demonic cause of anthropogenic global warming, CO2 has literally been taking all the heat lately. With CO2 concentrations pushing the 400 ppm range as of late, manmade global warmers believe they have the perfect scapegoat for dreaded global warming. If they're wrong, then the earth won't fry, there won't be incredulous risings of the sea and torrential floods, and life on earth will not come to a screeching halt.

Christopher Monckton (Brenchley) has written "Climate Sensitivity Reconsidered", which explains CO2 concentrations over the last 6 million years. As a member of the IPCC and APS (American Physical Society), Monckton puts CO2 concentration and temperature on the same scale which few have been able to do. The chart can be found as Figure #7 three quarters into his article, called Fluctuating CO2 But Stable Temperature for 600m Years.

In Correlation Falsification: The Missing Global Warming - CO2 Link ..., Noel Sheppard illustrates how CO2 is ~380 ppm (parts per million) now, and how it has never affected temperatures in the recent Past. read more »