Can Man cause Co2 to double? You hear over and over that a doubling of Co2 will lead to catastrophe. Nature can clearly double Co2; it was much higher in the atmosphere millions of years ago. But can Man?
This table from Doomed Planet says NO. The IPCC asserts that half of fossil fuel Co2 remains in the atmosphere. Currently we have 800 gigatonnes of Co2 up there, which makes up 388 ppm (part per million) of all air. If we burn all the remaining fossil fuels, we burn 647 gigatonnes of carbon, and if half remain up there, it only increases Co2 by another 157 ppm, well short of a double.
Funny. All this pernicious scientific manipulation for .. nothing.