Out of the world’s 100 most polluted cities, 94 are in India, China, and Pakistan.
Here’s a look at air quality around the world and the impact air pollutants have on our health 👇 aje.io/2suxut
How is air quality measured?
Air quality is determined by the levels of air pollutants PM2.5, PM10, ozone, nitrogen dioxide, sulfur dioxide, and carbon monoxide.
Particulate matter (PM) comprises tiny particles that negatively impact health aje.io/nb94se
Which cities are the most polluted in the world?
In 2020, India had 46 of the world’s 100 most polluted cities, according to air quality tracker IQAir.
Hotan, in western China’s Xinjiang, had the worst average air quality in 2020, with 110.2 aje.io/nb94se
What impact does air pollution have on our health?
More than 90% of the world’s population lives in areas where air pollution exceeds WHO limits
Air pollution is linked to a number of illnesses including asthma, diabetes, and heart disease aje.io/nb94se
How deadly is India's pollution?
In 2019, 1.67 million deaths in India were caused by air pollution, according to the Lancet.
While replacing solid fuels with alternatives have lowered deaths since 1990, deaths related to ambient PMs have increased aje.io/nb94se
What is a smog tower?
Some cities in India and China have installed smog towers to try to tackle air pollution.
They work within a 1km (0.6-mile) radius, supposedly cutting PM2.5 levels by 50%. But questions remain over how efficient they really are aje.io/nb94se
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