Which of the following is a health risk associated with ground level ozone? a. cataracts b. skin cancer c. respiratory illness d. all of the above

The correct answer is C. Respiratory illness

Explanation:

Ozone can be good or bad for human health. Ozone present in the ground level which means in the troposphere is called bad ozone because it causes respiratory problems in humans. At ground level, it is produced by reaction between nitrogen oxide and volatile organic compounds which are primary pollutants.

When we breath it gets into the lungs and causes constriction in lung airway muscles that traps the air in alveoli and results in shortness of breath. So ground-level ozone makes breathing more difficult, cause coughing, causes inflammation and damage to the airway, increases the chances of an asthma attack and other respiratory illnesses.  

So the correct answer is C.