25 Most Polluted Cities in the World (2023 Rankings)

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 2022 air pollution data for 529 major cities from 88 countries around the world to create the 2023 updated ranking of the …

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Ozone Generator Machine: Do They Really Work?

Ozone generator machines are popular tools to remove odors, pollutants, and viruses. But what does the science say about the effectiveness of ozone machines? The biggest downside of using an ozone generator is that ozone is harmful to humans! But hey, maybe ozone could be useful in an empty room? Scientists …

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Study Finds Ionizers Increase Air Pollution

A peer-reviewed study from the University of Texas finds that ionizers increase air pollution, creating formaldehyde, ozone, and particulate. This data contrasts sharply with claims from air purifier companies that market ionizers as magical machines. One company in China claims that their machine’s negative ions “remove PM2.5 particulate pollution and …

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Did Delhi Air Quality Have a “Good” November?

Although Delhi air pollution is already extremely dangerous in the summer months, Delhi air quality levels worse in the winter months. In particular, November is the month when air quality usually starts deteriorating due to factors like crop burning, Diwali, and a drop in temperature. Many use air purifiers at …

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Smart Air low cost purifiers

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

Certified B-Corp air purifier company