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Causes of poor air quality in Delhi
Motor vehicle emissions are one of the causes of poor air quality. Other causes include wood-burning fires, fires on agricultural land, exhaust from diesel generators, dust from construction sites, and burning garbage and illegal industrial activities in Delhi.
The Badarpur Thermal Power Station, a coal-fired power plant built in 1973, is another major source of air pollution in Delhi. Despite producing less than 8% of the city's electric power,
it produces 80 to 90% of the particulate matter pollution from the electric power sector in Delhi. During the Great smog of Delhi in November 2017, the Badarpur Power Plant was temporarily shut down to alleviate the acute air pollution, but was allowed to restart on 1 February 2018.
The drift/mist emissions from the wet cooling towers is also a source of particulate matter as they are widely used in industry and other sectors for dissipating heat in cooling systems
Although Delhi is kerosene free and 90% of the households use LPG for cooking, the remaining 10% uses wood, crop residue, cow dung, and coal for cooking. (Census-India, 2012)
Fire in Bhalswa landfill is a major reason for airborne particles in Delhi.
Agricultural stubble burning also affects Delhi's air quality when crops are being harvested.
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