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  1. 30 Σεπ 2022 · Air Quality Index (AQI) is a tool for communicating daily air quality. It uses several categories with numerical values ranges, colour codes, and statements for each category that tells about air...

  2. This report uses the US Air Quality Index (AQI) to visualize PM2.5 levels that exceed the WHO target. The index translates daily pollutant concentrations into 6 categories ranging from “good” (green) to “hazardous” (maroon).

  3. 18 Μαρ 2020 · The US AQI is among the most widely recognized index for communicating air quality. The index converts pollutant concentrations into a color-coded scale of 0-500, where higher values indicate increased health risk.

  4. 1 Ιαν 2009 · Air Quality Index (AQI) is a standardized summary measure of ambient air quality used to express the level of health risk related to particulate and gaseous air pollution.

  5. The recent update of the WHO air quality guidelines, a set of evidence-based recommendations for limit values of specific air pollutants, provides clear evidence of the damage that air pollution inflicts on human health, at even lower concentrations than previously recognized. The guidelines recommend new air quality levels to protect the ...

  6. 30 Ιουν 2015 · This paper attempt to present a review of all the major air quality indices developed worldwide. Architecture of PCA­neural network model for the forecasting of AQI. Breakpoint Concentration...

  7. www.iqair.com › dl › pdf-reportsContents

    This 2021 World Air Quality Report presents an overview of the state of global air quality in 2021. The report is based on PM2.5 air quality data from 6,475 cities in 117 countries, regions

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