Carbon dioxide is the most commonly cited greenhouse gas because of  its natural abundance in the atmosphere. It constitutes 80% of the  non-condensing greenhouse gases. Exp … erts believe that the removal  of CO2 will cool the Earth by 30 degrees Celsius.arbon dioxide is the most commonly cited greenhouse gas because of  its natural abundance in the atmosphere. It constitutes 80% of the  non-condensing greenhouse gases. Exp … erts believe that the removal  of CO2 will cool the Earth by 30 degrees Celsius.