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Stubble Burning Led To 36% Rise In PM 2.5 Pollutants In Delhi's Air
Delhi, 30 Oct 2020 1:30 PM GMT
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The air quality in Delhi entered the “severe category” for the first time since January. The farm fires, calm winds and low temperature has led to accumulation of pollutants in the air which has resulted in severely poor air quality in the national capital.
Of the total amount of PM 2.5 pollutants in Delhi's toxic air, stubble burning contributed to 36 per cent, a record high this season, the central government's air quality monitoring agency notified on Thursday.
According to Ministry of Earth Science's air quality monitor System of Air Quality and Weather Forecasting And Research (SAFAR), the number of farm fires in neighbouring states stood at 2,912 on Wednesday, which was recorded as the highest this season, PTI reported.
The air quality in Delhi entered the "severe category" for the first time since January. The farm fires, calm winds and low temperature has led to the accumulation of pollutants in the air which has resulted in severely poor air quality in the national capital.
According to SAFAR the locally generated pollutants and increased intrusion of north-northwesterly boundary level winds from the regions where stubble burning is practised, were the major contributing factors to increasing pollution levels in Delhi.
"Extremely calm surface and boundary layer winds along with the low nighttime boundary layer height resulted in low ventilation practically stagnant, no dispersion condition has resulted in the current situation," SAFAR said.
SAFAR has said that a better surface wind speed and better ventilation system can improve the condition by Saturday. Slow speed winds and low temperature capture the pollutants while a favourable wind speed helps in dispersal of pollutants.
The share of stubble burning in rising air pollution increased from nine per cent on Saturday to 18 per cent on Wednesday and stood at 36 per cent on Thursday.
Delhi's air quality index (AQI) increased from 366 on last Friday to 402 on Thursday. An AQI between 0 and 50 is considered 'good', 51 and 100 'satisfactory', 101 and 200 'moderate', 201 and 300 'poor', 301 and 400 'very poor', and 401 and 500 'severe'.
Also Read: Delhi Pollution Panel Imposes Fine Totalling Rs 4.05 Crore For Violating Air Pollution Control Norms
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