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Average PM2.5 levels in most polluted countries worldwide 2019

In 2019, the most polluted country in the world in terms of PM2.5 concentration was Bangladesh. With an average of 83.3 micrograms per cubic meter of air, this was considerably higher than the second most polluted country, Pakistan. The high levels of pollution in Bangladesh can be explained by the brick industry, with thousands of coal-fired kilns pumping out harmful pollutants following a construction industry boom.
Air pollution is one of the leading causes of premature deaths in the world, cutting millions of lives short every year, especially in Asia.

Average PM2.5 concentration of the most polluted countries in the world in 2019 (in micrograms per cubic meter of air)*

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Release date

March 2020



Survey time period


Supplementary notes

*PM2. 5 refers to atmospheric particulate matter that have a diameter of less than 2.5 micrometers

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