[cogitator]

I suppose the models must show CO2 levels increasing at geometric rather than arithmetic rates?

I'm not sure what you mean; the growth rate of CO2 in the atmosphere is (obviously) not controlled by the physical climate system, and projections for growth are dependent on economic and technological assumptions.

[Sam Cree]

I meant that I supposed that the actual *rate* of increase would also increase rather than remain steady. That the models would show that increasingly larger ppm would be added each year. I'm just wondering.

My assumption is that most of the increasing amounts would be projected to be coming from developing countries, while emissions from the US and Europe would decrease.

Probably worth noting that the 30% is in terms of the ppm, rather than the total fraction of the atmosphere occupied by CO2.

I have another question. Is CO inluded in the total ppm of CO2?