Most Polluted Countries Top 15(PM 2.5 air pollution(micrograms per cubic meter)

Fine particulate matter (PM2.5) is an air pollutant that is a concern for people's health when levels in air are high. PM2.5 are tiny particles in the air that reduce visibility and cause the air to appear hazy when levels are elevated.

The United States Environmental Protection Agency (EPA) established National Ambient Air Quality Standards for PM2.5 in 1997 and revised them in 2006 and 2012. National Ambient Air Standards are established to be protective of public health. The short-term standard (24-hour or daily average) is 35 micrograms per cubic meter of air (µg/m3) and the long-term standard (annual average) is 12 µg/m3. A microgram is a unit of weight. There are a million micrograms in a gram, and a pound is equal to about 450 grams(https://www.health.ny.gov/)

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Data Source: ourworldindata.org

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