Most polluted cities

Manama Bahrain Air Pollution One of Worst in World

25 Most Polluted Cities in the World (2021 Rankings)

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Air pollution is one of the leading causes of death around the world. But which cities and countries are the most polluted in the world? Smart Air analyzed 2021 air pollution data for 540 major cities from 182 countries around the world to produce the 2021 ranking of the “25 … Read more

Smart Air is a social enterprise that creates simple, no-nonsense air purifiers and provides free education to protect people’s health from the effects of air pollution. We are proud to be the only certified B-Corp dedicated to fighting air pollution.