[firebrand]

It's hard to tell from these graphs, since they cover such long periods of time. If what you say is true, it might be that the same factor(s) that cause(s) warming also cause(s) CO2 increase.

An interesting site is the government's website on global warming.

[proud_yank]

Interesting website. Do you, or anyone here, have any info on volcanoes and their effect on CO2? I have read that they emit huge amounts of greenhouse gases, relative to what people emit.