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  2. List of countries by air pollution - Wikipedia

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

    Air pollution can affect nearly every organ and system of the body, negatively affecting nature and humans alike. Air pollution is a particularly big problem in emerging and developing countries, where global environmental standards often cannot be met. The data in this list refers only to outdoor air quality and not indoor air quality, which ...

  3. Environmental issues in Egypt - Wikipedia

    en.wikipedia.org/wiki/Environmental_issues_in_Egypt

    The main air pollution problem in Egypt is particulate matter. The most notable sources of the dust and small particles are transportation, industry, and open-air waste-burning. Another significant source of dust is wind blown from arid areas around Egypt (e.g. Western Desert). The air in Egypt is very thick, grey and there is a haze over Cairo.

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

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

    The 2018 version of the WHO database contains results of ambient (outdoor) air pollution monitoring from almost 2700 towns and cities in 91 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] [2] [3]

  5. How to understand the Air Quality Index - AOL

    www.aol.com/news/how-to-understand-the-air...

    The AQI uses a scale that typically ranges from zero to 500 to denote air quality. If your area has an AQI of 50 or below, you're in a green zone. You should have good air quality and little or no ...

  6. Air quality index - Wikipedia

    en.wikipedia.org/wiki/Air_quality_index

    An air quality index (AQI) is an indicator developed by government agencies [1] to communicate to the public how polluted the air currently is or how polluted it is forecast to become. [2][3] As air pollution levels rise, so does the AQI, along with the associated public health risk. Children, the elderly and individuals with respiratory or ...

  7. Air pollution - Wikipedia

    en.wikipedia.org/wiki/Air_pollution

    Air pollution is the contamination of air due to the presence of substances called pollutants in the atmosphere that are harmful to the health of humans and other living beings, or cause damage to the climate or to materials. [1] It is also the contamination of the indoor or outdoor environment either by chemical, physical, or biological agents ...

  8. Environmental Performance Index - Wikipedia

    en.wikipedia.org/.../Environmental_Performance_Index

    Environmental Performance Index. The Environmental Performance Index (EPI) is a method of quantifying and numerically marking the environmental performance of a state's policies. This index was developed from the Pilot Environmental Performance Index, first published in 2002, and designed to supplement the environmental targets set forth in the ...

  9. Climate of Egypt - Wikipedia

    en.wikipedia.org/wiki/Climate_of_Egypt

    Egypt is the eighth most water stressed country in the world. Egypt receives between 20 mm (0.79 in) and 200 mm (7.87 in) of annual average precipitation along the narrow Mediterranean coast , but south from Cairo, the average drops to nearly 0 millimetres (0.00 inches) in the central and the southern part of the country.