Diwali is a joyous occasion for many Hindus who celebrate the festival of lights in India. But some people skirt the law, launching firecrackers that significantly contributes to lower air quality.
If air pollution permanently reduced to meet WHO air quality guidelines, it would "add 2.2 years onto average life expectancy", researchers say.
Delhi, one of the world’s most polluted cities, enjoyed some respite up until September in part thanks to a virus lockdown.
Taking population into account, Bangladesh emerged as the country with the worst so-called PM2.5 pollution, followed by Pakistan, Mongolia, Afghanistan and India, according to the 2019 World Air Quality Report.
Toxic haze from Indonesian forest fires closed thousands of schools across the country and in neighbouring Malaysia amid health concerns.
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