Uttar Pradesh’s Ghaziabad was adjudged the second most polluted city out of the 50 ‘most polluted cities’ in the world in 2020 by a report prepared by British company HouseFresh. Ghaziabad reported an average Air Quality Index (AQI) of 2.5 particulate matter (PM) in 106.6µg/m3.
Preceding Ghaziabad, the Chinese city of Hotan in Xinjiang province has been named the most polluted city with a PM2.5 of 110.2µg/m3. The report attributed the air pollution in Hotan to sandstorms resulting from its closeness to the Taklimakan Desert, which is the largest shifting sand desert in the world.
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Bangladesh, China, India and Pakistan contribute to 49 out of the 50 most polluted cities worldwide. According to the report, Bangladesh was the most polluted country across the world in 2020, followed by Pakistan, India and Mongolia. Meanwhile, Judbury in Australia bagged the top position in the list of cities with the cleanest air with a PM2.5 level of 2.4µg/m3. Kailua Kona in America’s Hawaii and Muonio in Finland with PM2.5 concentrations of 2.6µg/m3 and 2.8µg/m3 respectively were the next top cities of 2020 with clean air.
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