TNPSC Thervupettagam

IQAir Data - 2020 World Air Quality Report

November 25 , 2021 895 days 802 0
  • 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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