Answer:
On Humans.
People exposed to high enough levels of
certain air pollutants may experience:
Irritation of the eyes, nose, and throat
Wheezing, coughing, chest tightness, and breathing difficulties
Worsening of existing lung and heart problems, such as asthma
Increased risk of heart attack
<u>On </u><u>Environment</u>
<em>Acid rain </em>
<em>Eutrophication</em>
<em>Haze</em>
When most people in Africa has aids, its considered an epidemic. When most people are considered fat asfack in the US its also considered and epidemic.
the answer is a. skin color
