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  2. List of countries by air pollution - Wikipedia

    en.wikipedia.org/wiki/List_of_countries_by_air...

    The following list of countries by air pollution sorts the countries of the world according to their average measured concentration of particulate matter in micrograms per cubic meter (μg/m 3). The World Health Organization's recommended limit is 5 micrograms per cubic meter, although there are also various national guideline values, which are ...

  3. List of most-polluted cities by particulate matter concentration

    en.wikipedia.org/wiki/List_of_most-polluted...

    The January 2024 version of the WHO database contains results of ambient (outdoor) air pollution monitoring from almost 5,390 towns and cities in 63 countries. Air quality in the database is represented by the annual mean concentration of particulate matter (PM10 and PM2.5, i.e. particles smaller than 10 or 2.5 micrometers, respectively). [1 ...

  4. Air quality index - Wikipedia

    en.wikipedia.org/wiki/Air_quality_index

    The most commonly used air quality index in the UK is the Daily Air Quality Index recommended by the Committee on the Medical Effects of Air Pollutants (COMEAP). [39] This index has ten points, which are further grouped into four bands: low, moderate, high and very high. Each of the bands comes with advice for at-risk groups and the general ...

  5. The 10 Cities With the World's Worst Air - AOL

    www.aol.com/news/2010-11-29-10-cities-with-world...

    The poor air quality is sickening the city's residents. Studies have found that 4.63% of children under 14 suffer from asthma, although prevalence in girls may be underreported due to cultural bias.

  6. Delhi becomes world’s most polluted city as AQI levels reach ...

    www.aol.com/delhi-becomes-world-most-polluted...

    The AQI readings below 100 are considered to be satisfactory for breathing, under 200 are marked “poor”, while the 400-500 range mark pollution levels as "severe" in an area. AQI 1696.

  7. Asian countries have the worst air quality in the world ... - AOL

    www.aol.com/news/asian-countries-worst-air...

    Only 0.001 per cent of the world’s population breathes air considered acceptable, says study Asian countries have the worst air quality in the world, study finds Skip to main content

  8. Air pollution - Wikipedia

    en.wikipedia.org/wiki/Air_pollution

    The world's worst short-term civilian pollution crisis was the 1984 Bhopal ... Other examples of air quality laws around the world include the Clean Air Act in ...

  9. Asian capital makes public transport completely free to ... - AOL

    www.aol.com/news/asian-capital-makes-public...

    On Saturday, Bangkok was rated as the world’s seventh-most polluted city based on its air quality. It was the second-worst in Southeast Asia after Ho Chi Minh City in Vietnam .