air pollution
- Contamination of air by smoke and harmful gases, mainly oxides of carbon, sulfur, and nitrogen.
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The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
air pollution
The addition of harmful chemicals to the atmosphere. The most serious air pollution results from the burning of fossil fuels, especially in internal-combustion engines.
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The New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.