Environmental Science 14th Edition by Tyler Miller ,Scott Spoolman

Exercise 20

Suppose someone tells you that carbon dioxide (CO ₂ ) should not be classified as an air pollutant because it is a natural chemical that is part of the carbon cycle (see Figure 3-15, p. 53) and a chemical that we add to the atmosphere every time we exhale. Explain the faulty reasoning in this statement about CO ₂.