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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).
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. Click on the arrows next to the table's headers to have the most polluted cities ranked first.
Air pollution is among the biggest health problems of modern industrial society and is responsible for more than 10 percent of all deaths worldwide (nearly 4.5 million premature deaths in 2019), according to The Lancet. Air pollution can affect nearly every organ and system of the body, negatively affecting nature and humans alike.
English: This analysis focuses on the significant disparities in PM 2.5 levels across rural, urban, and metropolitan areas within five mostly populated countries during 2019. By examining the differences, the graph highlights the varying air quality conditions that exist based on country's population.
The reports provide guidelines intending to give guidelines to reduce the health effects of air pollution. [2] The guidelines stipulate that PM 2.5 should not exceed 5 μg/m 3 annual mean, or 15 μg/m 3 24-hour mean; and that PM 10 should not exceed 15 μg/m 3 annual mean, or 45 μg/m 3 24-hour mean. [2]
Difference between levels of PM 2.5 in the air in 2019 and 2022 among 70 capital cities [284] To analyse the air pollution trend, 480 cities around the world (Ukraine excluded) was mapped by air experts [284] to calculate the average PM 2.5 level of the first nine months of 2019 against that of 2022. [285]
The Inflation Reduction Act of 2022 amended the Clean Air Act to define CO ... PM 2.5 air pollution induced by the ... with air pollution in 2021 globally. ...
After a steady 23-year decline in US pollution levels through 2017, the American Lung Association's State of the Air 2022 report found a sharp uptick in pollution over the past five years. [ 96 ] According to the American Lung Association's State of the Air 2024 report, California retains its position of being the state with the most metro ...