How much CO2 does a person exhale in a minute while running?

Question

I'm looking for a comparison of CO2 output from an automobile & a human being.

Answer 1

What percent of the air we exhale is carbon dioxide?
Atmospheric Air
CO2=0.04%
Alveolar Air (from the lungs)
CO2=5.3% (from the first web site).
In the second web site, there is a description of a method for measuring the CO2 during the exercise.