I am shocked by how many up votes this got.     <i>C02 can get absorbed by the Oceans and other earth mechanisms and balance out.</i> The worldwide CO2 production is 4.53 metric tons per capita, that’s metric tons <i>of a gas.</i>  <a href="http://www.google.com/publicdata?ds=wb-wdi&#38;met=en_atm_co2e_pc&#38;tdim=true&#38;dl=en&#38;hl=en&#38;q=co2+emissions+GLOBAL" rel="nofollow">http://www.google.com/publicdata?ds=wb-wdi&#38;met=en_atm_co...</a><p>Calculate the increase in PPM of CO2 with the human production of CO2 and the numbers work out.   It’s not like we can’t figure out how much CO2 we released in the last 10 years, and compare atmospheric concentrations of CO2 from 10 years ago.  I could do these calculations for you, but work them out for yourself and you can see that yes humans do produce plenty of CO2 to alter the concentration in the atmosphere.<p>PS: Mass of gas in the atmosphere * concentration increase vs. Mass of gas produced.