Delhi most polluted city of India; other North Indian cities make it to list

In 2020, 22 out of the top 30 most polluted cities in the world were from India. Climate change too played a role in increasing air pollution. Hotan in China’s northwest ranked as the world’s most polluted cities largely due to sandstorms exacerbated by climate change. These were among the highlights of the 2020 

World Air Quality report by Switzerland based air quality technology company IQAir that was released on Tuesday. 
Air quality improved in 84% of all monitored countries due to Covid-19 related lockdowns in 2020, the report found. Some of the major improvements compared to the year 2019 were seen in Paris (-17%), Lo