20 Most Polluted Cities in the World
| January 2, 2017
Zabol, Iran
It’s difficult to determine which city is the smoggiest in the world because not all nations collect enough accurate data. One such city that is thought to be near the top is Zabol, an eastern Iranian city situated on the Afghani border.
The World Health Organization declares Zabol to be the worst offender when it comes to PM2.5 data, which measures particles that are 1/30th, the size of a human hair. These particles are small enough to enter the lungs and tissue and can cause extensive health problems.
Mr sargazi / Own Work
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