Pollutant Standards Index
Код 2394990
- ISBN: 978-5-5112-3457-1
Код 2394990
High Quality Content by WIKIPEDIA articles! The Pollutant Standards Index, or PSI, provides a uniform system of measuring pollution levels for the major air pollutants. It is based on a scale devised by the United States Environmental Protection Agency (USEPA) to provide a way for broadcasts and newspapers to report air quality on a daily basis.
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