Here is another way to look at  the CO2 production of a person  The average person puts about 2 lbs of CO2 into the air in a day.   This is 1/10 th the amount of CO2 produced by using one gallon of gas.

A quoted energy equivalent of a person is that of  a 100 watt light bulb, which is about 2.4 Kilowatt hours per day.  This 2.4 kilowatt hours divided by 33.4 kilowatt hours per gallon of gas is equivalent to about 1.4 pounds of CO2 per day.  Close enough to the above estimate of 2 pounds CO2 per day mentioned above.

Anyway, it is not an overstatement to say that a person adds about 2 pounds of CO2 in a day through the direct use of about 3.34 kilowatt hours of energy or that contained in 1/10th of a gallon of gasoline.

This is just for curiosity’s and a frame of reference.