ambient air quality

in atmospheric chemistry
A general term used to describe the quality of the outside air. Usually adjectives such as good, fair, bad, etc. are used by the media to describe this; often some form of @A00195@ or air quality index is employed to determine the specific descriptive term to be used. These are very qualitative terms of little or no scientific value.
See also:
air pollution index
PAC, 1990, 62, 2167. (Glossary of atmospheric chemistry terms (Recommendations 1990)) on page 2173 [Terms] [Paper]