"I suspect that is because the investment has already made in the atmosphere (the stuff is already up there) - that will impact us for the next 100 years (even if we put nothing else up)."

Last time I checked the facts, about 1/3 of all atmospheric carbon is removed each year.

With none coming in to replace it, the level would be less the 1% of present level in about 10 years time.

The claim that polution from the begining of the Industrial Revolution is still there shows how warped and unsuppoterd most of the GW promoters claims are.