New Delhi, Dec 21: Delhi's air quality in the month of November and first 10 days of December varied from poor, very poor to severe due to increased Particulate Matter (PM), Union Environment Minister Prakash Javadekar said today.
"Central Pollution Control Board (CPCB) has reported that in the month of November and first 10 days of December, Air Quality Index varied from poor, very poor to severe and is mainly attributed to increased Particulate Matter in ambient air, PM10 and PM 2.5 or both," the Minister said while replying to a question in Rajya Sabha.
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He said air pollution depends on prevailing meteorological conditions including wind direction, wind speed, mixing height, temperature variation, etc.
The high level of air pollution in Delhi is mainly because of PM, while sulphur dioxide, benzene and ozone were within the limits in the month of November and oxides of Nitrogen showed mixed trends.
"The prominent sources of PM emission in Delhi include road dust re-suspension, vehicular exhaust emissions, air traffic, railways, construction activities, gensets biomass and municipal solid waste burning, industrial emissions including from power plants," he said while replying to another question on air pollution.