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Air Pollution

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Air pollution is a mixture of solid particles and gases in the air. Car emissions, chemicals from factories, dust, pollen and mold spores may be suspended as particles. Ozone, a gas, is a major part of air pollution in cities. When ozone forms air pollution, it's also called smog.

Some air pollutants are poisonous. Inhaling them can increase the chance you'll have health problems. People with heart or lung disease, older adults and children are at greater risk from air pollution. Air pollution isn't just outside – the air inside buildings can also be polluted and affect your health.

Environmental Protection Agency

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The primary NIH organization for research on Air Pollution is the National Institute of Environmental Health Sciences -

Date last updated: September 10 2008
Topic last reviewed: May 19 2008