1.   The fog irritated his lungs and made him short of breath.

2.   Exposure to ozone can irritate the lungs, causing symptoms such as shortness of breath, chest pain, wheezing and coughing, according to the Lung Association.

3.   If you were to breathe hydrogen peroxide, it would irritate your lungs.

4.   In fact, some docs warn that people who suck down pure oxygen regularly run the risk of irritating their lungs.

5.   When inhaled, they can penetrate, then irritate the lung.

6.   Ground-level ozone, which can irritate the lungs, is created by a host of airborne pollutants from factory smokestacks and automobiles.