Air pollution is a mixture of solid particles and gases in the air. Car emissions, chemicals from factories, dust, pollen and mold spores may be suspended as particles. Ozone, a gas, is a major part of air pollution in cities. When ozone forms air pollution, it’s also called smog.

Air pollution has become one of the biggest problems for both developing as well as advanced countries. Many nations including India are struggling to contain toxic air and improve air quality.

What is more worrisome is that 21 of the world’s 30 most polluted cities are in India, with six of them in top 10, according to IQAir AirVisual’s 2019 World Air Quality (WAQ) report.

According to World Economic Forums (WEF) report, 1.25 million people are killed by air pollution in India every year.

The 2019 WAQ report from IQAir, which is a Swiss air quality technology company, also mentioned Delhi having the worst air pollution level (PM2.5) in any global capital.

Let’s took a look at some of the most affected cities due to air pollution in the world

Delhi (India)

Hotan (China)

Faisalabad (Pakistan)

Dhaka (Bangladesh)

Bekasi (Indonesia)

Shenyang (China)

Bishkek (Kyrgyzstan)

Ulaanbaatar (Mongolia)

A World Health Organization (WHO) estimate suggests poor air kills around seven million people around the world every year.

Chinese capital Beijing which once used to be one of the most polluted cities has improved its air quality. The city has also improved its place in the list of most polluted cities from 84 to 119.

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