This document summarizes the health effects of air pollution. It states that children, the elderly, and those with preexisting heart or lung conditions are most vulnerable. The risks depend on individual health, pollutant type and concentration, and exposure length. Common diseases caused by air pollution include respiratory illnesses like asthma, COPD, and pneumonia as well as heart disease, cancer, and premature death. Air pollution has been shown to increase risks for a variety of health issues.