Indian cities have dirtiest air; Delhi at the top, says WHO

Thirteen of the dirtiest 20 cities were Indian, with New Delhi, Patna, Gwalior and Raipur in the top four spots.

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http://indianexpress.com/article/india/india-others/indian-cities-have-dirtiest-air-delhi-at-the-top-says-who/
Publication Date: 
08/05/2014