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Most polluted cities and countries in the world, according to IQAir


Commuters make their way along a street amid smoggy and foggy conditions early in the morning in Lahore on January 3, 2023.

Arif Ali | AFP | Getty Images

About 90% of the global population in 2022 experienced unhealthy air quality, and only six countries met the World Health Organization’s recommendations of safe air pollutant levels, according to a new report from Swiss air quality technology company IQAir.

IQAir measured air quality levels based on the concentration of lung-damaging airborne particles known as PM 2.5. Research shows that exposure to such particulate matter can lead to heart attacks, asthma attacks and premature death. Studies have also linked long-term exposure to PM 2.5…


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