Six most polluted cities in world | Where do you stand?

With pollution becoming an increasing concern for climate change, a real-time report by IQAir shows the top five most polluted cities in the world.According to the report by the Swiss air quality technology company, till 9:21 pm, three Indian cities ranked in the top five of the most polluted cities in the world.According to environmental experts and an earlier report by the Food and Agriculture Organisation, pollution is caused mostly by the transport sector and industries, and not just crop burning. Trans-boundary pollution is also not the main reason as the Met Department has confirmed that Punjab primarily experiences a westerly wave during winter.The rankings may change as per the real-time evaluation.

Ulaanbaatar, Mongolia: Ulaanbaatar tops the list with 323 US AQI. Credit: Reuters Photo

Delhi, India: Delhi ranks second with 298 US AQI. Credit: PTI Photo

Lahore, Pakistan: Lahore is among the third most polluted cities in the world with 235 US AQI. Credit: PTI Photo

Dhaka, Bangladesh: Dhaka is the fourth most polluted cities in the world with 209 US AQI. Credit: AFP Photo

Kolkata, India: Kolkata is the second Indian city to be on the top five list with 184 US AQI. Credit: AFP Photo

Mumbai, India: India's financial capital, Mumbai ranks 6th highest with 182 US AQI. Credit: PTI Photo