Poor air quality is now one of the greatest threats to human health. That’s according to a study from the University of Chicago’s Energy Policy Institute. Researchers say air pollution cuts life expectancy by five years in South Asia, the worst affected region.

Two BBC reporters — Jaidaa Taha in Cairo and Trisha Husada in Jakarta — tell us what it’s like living in cities coping with high levels of pollution. And from Delhi our South Asia correspondent, Samira Hussain, discusses the startling impact pollution can have on health outcomes.

We also hear from Glory Dolphin Hammes — the CEO of IQAir, a tech company that monitors air quality in real time around the world.

Email: whatintheworld@bbc.co.uk WhatsApp: +44 0330 12 33 22 6 Presenter: Hannah Gelbart Producers: William Lee Adams, Mora Morrison, Alex Rhodes and Julia Ross-Roy Editors: Verity Wilde and Rachael Akidi Okwir

Why air pollution is keeping some people home 15:26 Share

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Why air pollution is keeping some people home