claim: Human additions of CO2 are in the margin of error of current measurements and the gradual increase in CO2 is mainly from oceans degassing as the planet slowly emerges from the last ice age.
evidence: The beginning of human agriculture during the current Holocene epoch may have been strongly connected to the atmospheric CO 2 increase after the last ice age ended, a fertilization effect raising plant biomass growth and reducing stomatal conductance requirements for CO 2 intake, consequently reducing transpiration water losses and increasing water usage efficiency.
category: Carbon dioxide in Earth's atmosphere