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Air quality is usually expressed as Air Quality Index (AQI), the Air Pollution Index (API) or Pollutant Standard Index (PSI). These indexes represent the measurement of the concentration of certain contaminants (pollutants) in the air. When the air quality is bad, API increases. The poor air quality (pollution) can irritate one's eyes, nose, and throat, cause shortness of breath, aggravate asthma and other respiratory conditions, and even affect heart and cardiovascular system.

The common contaminants to be measured in the metropolitan area are ozone and particulate matter (PM). Cars and trucks and other mobile sources are the major sources of ozone in the summertime. In the winter, wood smoke from wood stoves and fireplaces is a major source of PM pollution. Many countries monitor ground-level ozone, particulates, sulfur dioxide, carbon monoxide and nitrogen dioxide and calculate air quality indexes for these pollutants.

 6 companies matched 
1 Brass Turned Parts Uk ltd
makers of Brass turned parts with offices in UK
Best Air Compressor Manufacturers in India
manufacturers and supplier of air compressor, reciprocating compressor, screw air compressor, rotary air compressor, portable compressor, borewell compressor pumps, rotary screw compressor, piston...
Brass Components India Jamnagar Brass components
Suppliers of Brass components turned parts machined components Brass hose fittings hsoe barbs turned components
Greeny mist eliminator factory
Fiber Bed Mist Eliminators,Mist Eliminator,Mist Eliminator Filter,Oil Mist Eliminator,Pad Mist Eliminators.
Plan B Solutions
New, used, and rebuilt/refurbished abrasive blast equipment and dust collectors, air compressors, motors and drives, controls automation and electrical applications, PLC programming and upgrades
Temperature & Process Instruments, Inc.
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