The document discusses various types of air pollution including their natural and man-made causes. It describes primary and secondary pollutants and defines smog as a combination of smoke and fog produced when nitrogen compounds and VOCs react with sunlight to form ozone. Specific types of air pollution covered include acid rain, particulate pollution, and chlorofluorocarbons which damage the ozone layer. Both short term health effects like coughing and long term effects like cancer and heart disease are noted.

1. Air Pollution

9. Acid rain damage Acid rain damage to trees and buildings. A. Trees atop Mt. Mitchell in the Blue Ridge Mountains of western North Carolina [4]. B. & C. Marble statue in Hertzen, Germany, B taken in 1908 and C taken in 1969 [5].

10. More acid rain damage

13. Chlorofluorocarbons