The document discusses the negative health impacts of air pollution. It notes that air pollution is a major risk factor for diseases like asthma, emphysema, lung cancer and heart attacks. Key pollutants discussed are ozone, particulate matter and nitrogen oxides which come primarily from traffic and power plants. Exposure to ozone and particulate matter is linked to increased asthma attacks, respiratory infections, and cardiac issues. Children and the elderly are most vulnerable to the health damage caused by air pollution. The document advocates for prioritizing improvements to air quality in decision making.