India has 14 out of the 15 most polluted cities in the world in terms of PM 2.5 concentrations -- the worst being Kanpur with a PM 2.5 concentration of 173 micrograms per cubic metre, followed by Faridabad, Varanasi and Gaya.
from Times of India https://ift.tt/2Kx9z5Q
Wednesday, 2 May 2018
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