Breathing poison in the world's most polluted city

Saharan dust, traffic fumes and smog from Europe may be clogging up London's air at present - and causing alarm in the newspapers - but in the world's most polluted city London's air would be considered unusually refreshing. That city is Delhi, the Indian capital, where air quality reports now make essential reading for anxious residents.

http://www.bbc.com/news/magazine-32352722

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Mark Danielson (CC BY-NC 2.0)

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