New Delhi has emerged as the most polluted capital city in the world for the fourth year in a row in the latest World Air Quality Report for 2021. The report found that no country met the World Health Organization’s (WHO) PM2.5 annual air quality guidelines last year as it analysed PM2.5 air pollution measurements from air monitoring stations in 6,475 cities.
New Delhi is followed by Dhaka (Bangladesh), N’Djamena (Chad), Dushanbe (Tajikistan) and Muscat (Oman) as top five most polluted capital cities respectively. Bhiwadi was the most polluted city in India, followed by Ghaziabad, Delhi and Jaunpur. Bangladesh was the most polluted country, followed by Chad, Pakistan and Tajikistan. India was the fifth most polluted country.
