World's 10 Highly Polluted Cities

5. Kermanshah, Iran: With an air pollution index of 229 ug/m3, Kermanshah in Iran ranks sixth on the most polluted cities list. Traditionally an agricultural center, the city is fast becoming industrialized with 256 manufacturing units within the city, including Kermanshah Oil Refining Company which was established in 1932 by the British. Industries today include sugar refining, petrochemicals and electrical equipment all of which are starting to overwhelm the city.
But the real problem lies in the dust storms that regularly sweep through the city of Kermanshah.

6. Peshawar, Pakistan: Fondly called as the City of Flowers, Peshawar is now not even close to its past glory. This is mainly attributed to the rising level of pollution. The city records for 219 micrograms of polluting particles per cubic meter. In Peshawar, air pollution is a source of significant concern.

The main sources include industrial emissions, fumes from the brick kiln factories, extensive burning of solid waste, and vehicular emissions. Noise pollution is also a problem in this city, as it exceeds the normally permitted 85 decibels threshold. The noise is created from planes and trains with ineffective silencers.
It’s enormous expansion and influx of migratory workers has caused a boom in urban pollution. It is also a key city from where the U.S. launches many of its strategic campaigns in Afghanistan.

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