Delhi records its most polluted day of the year
December 23, 2015  20:12
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It was the most polluted day of the year in Delhi today with the authorities recording the highest levels of suspended particulate matters PM 2.5 and PM 10, taking the air quality into the 'severe' category across the city. 

Although a definite conclusion could not be reached immediately, the experts attribute the spike to "open biomass burning", mainly burning of dry leaves to fight cold, across the region for the "extraordinary rise" in the levels of the particulate matters. 

The air quality across Delhi had plunged into 'severe' level post Diwali, but pollutants had shown a steady fall earlier this month.
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