Among the most populous cities in the world Delhi had the highest levels of PM2.5 pollution in 2019
Standfirst ...
Population-weighted PM2.5 (µg/m3)
0
20
40
60
80
100
Delhi, India
Kolkata, India
Kano, Nigeria
Lima, Peru
Dhaka, Bangladesh
Jakarta, Indonesia
Lagos, Nigeria
Karachi, Pakistan
Beijing, China
Accra, Ghana