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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.
Begusarai, a city of half a million people in northern India’s Bihar state, was the world’s most polluted city last year with an average annual PM2.5 concentration of 118.9 — 23 times the ...
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. Please note that constraints exist in this type of ...
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 ...
In an apparent wake-up call to Asia, the world’s 100 most polluted cities in 2020 all happened to be in the continent, according to the latest annual report by air quality tracker IQAir ...
Levels of hazardous small particles known as PM2.5 in the air in Hanoi were at 187 micrograms per cubic metre late on Monday, the highest among a list of most polluted international cities ...
e. 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 ...
Air pollution in South Korea. Air pollution in South Korea is an increasing threat to people and the environment. The air pollution comes from many sources, both domestic and international. Many forms of pollution have increased in South Korea since its rapid industrialization, especially in Seoul and other cities.