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2. Particulate pollution - Wikipedia

   en.wikipedia.org/wiki/Particulate_pollution

   Particulate pollution is observed around the globe in varying sizes and compositions and is the focus of many epidemiological studies. Particulate matter (PM) is generally classified into two main size categories: PM 10 and PM 2.5. PM 10, also known as coarse particulate matter, consists of particles 10 micrometers (μm) and smaller, while PM 2 ...

3. Air quality guideline - Wikipedia

   en.wikipedia.org/wiki/Air_quality_guideline

   Air quality guideline. The World Health Organization guidelines were most recently updated in 2021. [1] The guidelines offer guidance about these air pollutants: particulate matter (PM), ozone (O 3), nitrogen dioxide (NO 2), sulfur dioxide (SO 2) and carbon monoxide (CO). [2] The WHO first released the air quality guidelines in 1987, then ...

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

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

   This list contains the top 500 cities by PM2.5 annual mean concentration measurement as documented by the World Health Organization covering the period from 2008 to 2017. The 2018 version of the WHO database contains results of ambient (outdoor) air pollution monitoring from almost 2700 towns and cities in 91 countries.

5. 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 ...

6. PM2.5 - Wikipedia

   en.wikipedia.org/?title=PM2.5&redirect=no

   PM 2.5. PM. 2.5. If the redirected subtopic could potentially have its own article in the future, then also tag the redirect with { { R with possibilities }} and { { R printworthy }}. To a section: This is a redirect from a topic that does not have its own page to a section of a page on the subject. For redirects to embedded anchors on a page ...

7. Particulates - Wikipedia

   en.wikipedia.org/wiki/Particulates

   According to a study conducted by NASA and NIER, 52% of PM 2.5 measured in Olympic Park, Seoul in May and June 2016 came from local emissions. The rest was trans-boundary pollution coming from China 's Shandong Province (22%), North Korea (9%), Beijing (7%), [[Shanghai (5%), and a combined 5% from China's Liaoning Province, Japan and the West ...

8. List of least-polluted cities by particulate matter concentration

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

   Below is a list of 526 cities sorted by their annual mean concentration of PM2.5 (μg/m 3) in 2022. [1] [2] By default the least polluted cities which have fewest particulates in the air come first.

9. Air pollution - Wikipedia

   en.wikipedia.org/wiki/Air_pollution

   A study concluded that PM 2.5 air pollution induced by the contemporary free trade and consumption by the 19 G20 nations causes two million premature deaths annually, suggesting that the average lifetime consumption of about ~28 people in these countries causes at least one premature death (average age ~67) while developing countries "cannot be ...