13. Jaipur, West India
> Population: 3.5 million
> Average annual PM2.5 pollution per cubic meter: 104.6 micrograms
> Average annual PM10 pollution per cubic meter: 192.6 micrograms
12. Greater Cairo, Egypt
> Population: 18.8 million
> Average annual PM2.5 pollution per cubic meter: 116.6 micrograms
> Average annual PM10 pollution per cubic meter: 284.0 micrograms
11. Gurgaon, North India
> Population: 902,000
> Average annual PM2.5 pollution per cubic meter: 119.6 micrograms
> Average annual PM10 pollution per cubic meter: 124.3 micrograms
10. Muzaffarpur, East India
> Population: 439,000
> Average annual PM2.5 pollution per cubic meter: 120.0 micrograms
> Average annual PM10 pollution per cubic meter: 220.9 micrograms
9. Agra, North India
> Population: 2.0 million
> Average annual PM2.5 pollution per cubic meter: 131.4 micrograms
> Average annual PM10 pollution per cubic meter: 194.5 micrograms