Kanpur second most polluted city, Lucknow fifth: WHO
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Kanpur is the second most polluted city in India, according to World Health Organization's (WHO) urban air pollution database released on Monday.
Ludhiana ranks as the most polluted city with 251 micrograms per cubic metre of PM10 with Kanpur following at 209 micograms per cubic metre.
Delhi ranks third with 198 while Lucknow and Indore round off the top five list with 186 and 174 micrograms per cubic metree of PM10 respectively. Out of the 32 cities in the country considered by the report, Amritsar is the least polluted with 41 micrograms per cubic metre of PM10.
The WHO report recorded particulate matter (PM) presence in 1,100 cities in 91 countries of the world from 2003 to 2010.
Mumbai ranks third among metropolitan cities with the highest being Delhi and the lowest being Chennai with 48 micrograms per cubic metre. Kolkata came in second with 148 micrograms per cubic metre while Bangalore was fourth with 90 micrograms per cubic metre.
However, as a whole, India ranks the thirteenth most polluted country out of the 91 considered with an annual mean of 109 micrograms per cubic metre of PM10.
The cleanest city in the world is Whitehorse in Canada and the most polluted is Ahwaz in Iran with 372 micrograms per cubic metre.