30.As per air quality report by IQAir for the year 2020, which country had the highest number of polluted cities in top 100 polluted cities of the world?
As in previous years, South and East Asian locations emerge as the most polluted globally. Bangladesh, China, India, and Pakistan share 49 of the 50 of the most polluted cities worldwide. The COVID-19 pandemic emerged as a major, exceptional factor influencing air quality during 2020.
