Now letŐs consider what happens to all that CO2 that is emitted into the atmosphere. 
Of the 6.3 gigatons of carbon being put into the atmosphere every year by fossil fuel burning and the 2.2 gigatons being put there by deforestation (total 8.5 gigatons), only about 3.2 gigatons actually remains there. 
The amount remaining can be calculated directly from the increase in atmospheric CO2. 
So where is all the excess CO2 going?