Apart From Delhi, These Two Indian Cities Among World's 10 Most Polluted After Diwali. In Pics

Delhi topped the list, recording an AQI of 412, which falls under the 'severe' catergory as residents flouted the ban on firecrackers on Diwali night. (Image Source: PTI)

Toxic smog has also engulfed eastern Pakistan. The AQI in Lahore stood at 262 on Monday, making it the second-most polluted city in the world. Several cities, including Lahore, have been shut down due to the spike in pollution. (Image Source: Getty)

Iran's Baghdad is third on the list to have the worst air quality, as per IQ Air. The AQI was recorded at 206 on Monday. Pollution due to oil and gas refineries is one of many environmental issues the country faces. (Image Source: Getty)

Apart from Lahore, the second Pakistani city in the most polluted list is Karachi, which has also been engulfed by a layer of toxic smog in the past few weeks. The AQI in Karachi this morning stood at 180, making it the fourth city in the world to have the worst air quality. (Image Source: Getty)

Kuwait is fifth in the list and the major contributors to pollution are the petrochemical industries as well as frequent dust storms. (Image Source: Getty)

Kolkata is the third Indian city to feature in the list and is the sixth city in the world with the worst air quality. The AQI today stood at 167. (Image Source: PTI)

Dhaka stood seventh in the list, with an AQI of 155. Textile businesses, tanneries, chemical and cement factories, and brick kilns are the major pollution contributers, as per a study by Europen Respitratory Journal. (Image Source: Getty)

After Diwali, Mumbai also saw a spike in pollutants and is the eighth city in the world with the worst air quality. The AQI there stood at 154. (Image Source: PTI)

Bosnia and Herzegovina's Sarajevo featured ninth in the list, with an AQI of 153. (Image Source: Getty)

Qatar's Doha is the tenth city on this list with the worst air quality. The AQI on Monday stood at 149. Dust storms, vehicle and industrial emissions are the main causes behind pollution in Doha. (Image Source: Getty)