Insight Bureau: New Delhi has been ranked the world’s most polluted capital city for s second consecutive year, as per the 2021 World Air Quality Report. Dhaka (Bangladesh) is in second place followed by N’Djamena (Chad), Dushanbe (Tajikistan) and Muscat (Oman).
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Of the 15 most polluted cities in Central and South Asia in 2021, 12 were in India. New Delhi saw a 14.6 per cent increase in PM2.5 concentration in 2021, 96.4 Ig/m3, up from 84 Ig/m3 in 2020.
