http://www.theracquet.net/viewpoint/...ange-1.2185141
"The amount of CO2 increases after the Earth's temperature increases. Volcanoes produce more CO2 each year than all humans combined, and the amount volcanoes produce is further dwarfed by the amount created through other natural sources such as animals and bacteria as well as the process of decomposition.
Humans and the natural sources previously mentioned when combined do not come close to the real source of CO2 responsible for increased levels after a temperature increase is seen. The largest CO2 sources are, by many levels of magnitude, the oceans. Substantial amounts of CO2 are dissolved in the oceans and it is released as they are warmed. CO2 is a product of temperature change."