CO2's effect is on the greenhouse effect is logarithmic. The small amount humans contribute will amount to very little additional heat retained by the atmosphere.
35 posted on 05/14/2013 11:55:28 AM PDT by Straight Vermonter
(Posting from deep behind the Maple Curtain)
That graph must be somewhat dated. It says that present CO2 is about 380 ppm. Last I heard, it was something like 392 ppm, the present 400 ppm measurement notwithstanding.
