air pollution

Medical Dictionary

air pollution n.
Contamination of air by smoke and harmful gases, mainly oxides of carbon, sulfur, and nitrogen.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Cultural Dictionary

air pollution definition


The addition of harmful chemicals to the atmosphere. The most serious air pollution results from the burning of fossil fuels, expecially in internal-combustion engines.

The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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