Progress toward a uniform air pollution index. 1975

G C Thom, and W R Ott

UI MeSH Term Description Entries
D011786 Quality Control A system for verifying and maintaining a desired level of quality in a product or process by careful planning, use of proper equipment, continued inspection, and corrective action as required. (Random House Unabridged Dictionary, 2d ed) Control, Quality,Controls, Quality,Quality Controls
D000397 Air Pollution The presence of contaminants or pollutant substances in the air (AIR POLLUTANTS) that interfere with human health or welfare, or produce other harmful environmental effects. The substances may include GASES; PARTICULATE MATTER; or volatile ORGANIC CHEMICALS. Air Quality,Air Pollutions,Pollution, Air
D014481 United States A country in NORTH AMERICA between CANADA and MEXICO.

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