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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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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How Much Air Pollution Does Diwali Create?

Fireworks are everywhere during Diwali. So that got me thinking: just how much air pollution does Diwali create in India? We tracked the data the published PM2.5 data for 2021 Diwali, and share the results of our own tests as well. Testing Diwali Air Pollution in Delhi The Smart Air …

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Are Essential Oils and Oil Diffusers Safe?

The use of essential oil diffusers such as the popular “Air Wick Essential Mist Diffuser” can be extremely relaxing. Many essential oils such as lavender, tea tree, and eucalyptus are touted to have a variety of benefits ranging from pain relief to boosting your mood. But can essential oil diffusers actually …

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How far can wildfire smoke travel?

How Far Can Wildfire Smoke Travel?

Wildfire smoke can travel a long way. And this wildfire smoke is a serious health concern. But how far can wildfire smoke travel exactly? Can someone in New York be affected by the California wildfires thousands of miles away? Do Australian bushfires affect the entire country? During the ravaging California …

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Did Chennai Air Quality Get Better in 2021?

Chennai air quality worsened by 11.5% in 2021 compared to 2020. This leaves Chennai with air pollution levels 6 times higher than the World Health Organization’s annual limit. What are the trends in Chennai air quality and how does Chennai air pollution compare to other Indian cities? Chennai Air Quality: …

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Mumbai During Lockdown

Mumbai Air Quality Exceeds 8 Times WHO Limit in 2021

Mumbai air quality improved 2% in 2021, compared to the previous year. These higher air pollution levels push Mumbai’s annual PM2.5 average to more than eight times the World Health Organization’s annual limit of 5 µg/m3. Let’s dive into what trends we see throughout the year with Mumbai air quality and …

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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.

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