AIR QUALITY STANDARDS
The maximum level which will be permitted for a given pollutant. Primary standards are to be sufficiently stringent to protect the public health.
Air quality standards designed to protect human welfare, including the effects on vegetation and fauna, visibility and structures.
Secondary Pollutant ...
National Ambient Air Quality Standards - permalink - collapse
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Prevention of Significant DeteriorationA program, specified in the Clean Air Act, whose goal is to prevent air quality from deteriorating significantly in areas of the country that are presently meeting the ambient air quality standards.
National Ambient Air Quality StandardsIn the United States, national standards for the ambient concentrations in air of different air pollutants designed to protect human health and welfare.
National Ambient Air Quality Standards (NAAQS) (in the US)
National Center for Atmospheric Research (NCAR) (in the US)
National Climatic Data Center (NCDC) (in the US) ...
Prevention of Significant Deterioration (PSD): A permitting program for new and modified stationary sources of air pollution located in an area that attains or is unclassified for national ambient air quality standards (NAAQS).
NAAQS"Abbreviation for National Ambient Air Quality Standards.
NACA Standard Atmosphere"See standard atmosphere.
nacreous clouds"(Also called mother of pearl clouds; rarely, luminous clouds.) See polar stratospheric clouds.
When air pollutants of high concentration from exhaust or stack gases are emitted into cleaner air, the resulting polluted mixture is called the ambient air. National Ambient Air Quality Standards (NAAQS) apply to this final mixture, ...
 See also: Air, Atmosphere, Temperature, Weather, Earth
  
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