You are presented with the question "What does breathing pollutants do?" and the following answer choices: 
- Harms the respiratory system
 - destroying life
 - scraping oneself on a contaminated object
 - direct damage to the lungs
 - cause people to become sick.
 - Heals the respiratory system
 - Harms the stomach
 - Improves vision

Now knowing that air pollution harms the respiratory and circulatory systems and breathing air pollutants can increase the chances of experiencing health problems, choose the best answer.


 

 Harms the respiratory system        