Two more Indian cities join the list of 10 most polluted cities in the world

The severe air pollution in South Asia is disrupting the daily lives of millions of people and also affecting schools. Due to the pollution, several schools were closed, which affected the sports events. The government is advising people to stay indoors to prevent health issues. (ANI photo)

Mumbai and Kolkata joined New Delhi to become the world's top 10 most polluted cities with smoke heavy in the air a day after the people burn firecrackers for Diwali. (AP Photo)

New Delhi took, as it often does, the top spot.This region has emerged as a major global hotspot for air pollution. It had an air quality index (AQI) figure of 407, putting it the "hazardous" category, according to Swiss group IQAir, a Swiss group that assesses air quality. (AP photo)

To reduce the impact of firecrackers on air pollution, the Delhi government has been following the practice of banning all kinds of firecrackers for the last three years but still, it has been violated in several areas of Delhi. (AP Photo)

The financial capital of India which joined the list is Mumbai, which currently stood at sixth position. The Bombay HC had permitted the busting of firecrackers only for 3 hours i.e. between 7 pm and 10 pm. (AP Photo)

Another Indian city that joined the list is Kolkata. The city stood on the list with an Air Quality Index (AQI) of 154. (IANS Photo)

Pakistan's Lahore stood at the second position in the list. The city stands with AQI 384. (IANS Photo)

Bangladesh's capital Dhaka became the third most polluted city in the world. In the evening, the city stood with 170 AQI. (IANS Photo)

Air Quality Index (AQI) level of 400-500 affects healthy people and is dangerous to those with existing diseases, while a level of 150-200 brings discomfort to people with asthma, lung and heart problems. Levels of 0-50 are considered good. (Reuters photo)