Cold wave makes Delhi air quality 'severe' for fourth straight day; city facing worst pollution crisis since Diwali

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The overall PM 2.5 level (fine particulate matter in the air with a diameter of less than 2.5 micrometre) was recorded at 271 and the PM 10 level at 422 here, the CPCB said

from Latest News India on Firstpost http://bit.ly/2Ahw1N1
Press Trust of India

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