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IQAir Data - 2020 World Air Quality Report
November 25 , 2021
1087 days
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- Air quality is determined by looking after the levels of air pollutants like PM2.5, PM10, ozone, sulfur dioxide, nitrogen dioxide, and carbon monoxide.
- India had 46 of the world’s 100 most polluted cities in 2020.
- India is followed by China (with 42 cities), Pakistan (with 6 cities), Bangladesh (with 4 cities)
- India accounts for 9 of the top 10 most polluted cities worldwide.
- These 9 cities are Ghaziabad, Bulandshahr, Bisrakh Jalalpur, Bhiwadi, Noida, Greater Noida, Kanpur, Lucknow, and Delhi.
- New Delhi was the world's most polluted capital for the third straight year in 2020.
- It is estimated that 20 to 40 per cent of Delhi’s air pollution comes from agricultural burning in and around the national capital.
- In 2020, Hotan city in China’s Xinjiang province had the worst average air quality.
- IQAir is a Swiss air quality technology company.
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