Well, here's the thing. You keep coming back to the fact that in Cambrain times CO2 levels were much higher. And they were, for purely natural reasons. Now they are much lower. Ever wondered where it all went?
The answer is underground. As I have said, in the Carboniferous alot of trees grew in swamps, and when they die they fall into the mud. Usually a dead organism would rot away, and the Carbon would return to the atmosphere, but in the anaerobic conditions in the mud, that could not happened. So they were fossilised, and the result is what we call coal, and substance that is mostly carbon.
We burn it. Combustion. The molecules are combining with oxygen in the atmosphere, and as it is mostly carbon, the result is CO2 (and some carbon monoxide). It goes back into the atmosphere. Now we know that Cabon Dioxide andhane (and to a lesser extent, water vapour) are greenhouse gasses: Their presence in the upper atmosphere increases the amount of heat that is reflected off of the Earth that is reflected again back to the ground.
Now tell me that burning fossil fuels is not a major contributing factor to Gobal Wrming.
__________________
| (• ◡•)| (❍ᴥ❍ʋ)
|