The document discusses various types of air pollution including carbon monoxide, nitrogen oxides, sulfur oxides, volatile organic compounds, and particulates. It provides examples of natural and man-made sources of these pollutants, such as incomplete combustion of fossil fuels producing carbon monoxide, combustion engines producing nitrogen oxides, and volcanic eruptions emitting sulfur dioxide. Methods for reducing air pollution are also mentioned, like using catalytic converters to convert carbon monoxide and nitrogen oxides into less harmful compounds.