Top 8 main causes of air pollution in Delhi:- The toxic levels of air pollution in and around Delhi are creating quite a menace. Adding to the severity, the changing weather conditions have locked the pollutants in the air and made the situation worse. Doctors are warning people of dire consequences and discouraging them from stepping outdoors. 1. National capital shares its border with the states of Haryana and Uttar Pradesh. One of the main reasons for increasing air pollution levels in Delhi is crop burning by the farmers in these states. Farmers burn rice stubbles in Punjab, Haryana and Uttar Pradesh. It is estimated that approximately 35 million tonnes of the crop are set afire by these states. The wind carries all the pollutants and dust particles, which have got locked in the air. 2. Pollution caused by the traffic menace in Delhi is another reason contributing to this air pollution and smog. The air quality index has reached ‘severe’ levels. Vehicular emission is increasing the hazardous effects of air pollution and smog. The Central Pollution Control Board (CPCB) and the National Environmental Engineering Research Institute (NEERI) have declared vehicular emission as a major contributor to Delhi’s increasing air pollution. 3. As the winter season sets in, dust particles and pollutants in the air become unable to move. Due to stagnant winds, these pollutants get locked in the air and affect weather conditions, resulting in smog. 4. Another reason of air-pollution is over-population in the capital. Over-population only adds up to the various types of pollution, whether it is air pollution or noise pollution. 5. Investing less on public infrastructure is another reason of air pollution. In India, investment in public transport and infrastructure is low which leads to congested roads, and hence air pollution. 6. Large scale construction in Delhi-NCR is another culprit that is increasing dust and pollution in the air. Considering the dipping air quality, a number of construction sites have stalled work, as directed by the Delhi Government. 7. Industrial pollution and garbage dumps are also increasing air pollution and building-up smog in the air. 8. Despite the ban on cracker sales, firecrackers were a common sight this Diwali. It may not be the top reason for this smog, but it definitely contributed to its build-up.

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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. In view of the detrimental effect to the environment, the power plant has been permanently shut down since 15 October 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, 2011) Fire in the Bhalswa landfill is a major reason for airborne particles in Delhi. Heavy metal-rich fire-crackers Agricultural stubble burning also affects Delhi's air quality when crops are being harvested

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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, burning garbage and illegal industrial activities in Delhi.

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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, burning garbage and illegal industrial activities in Delhi.

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दिल्ली में वायु प्रदूषण मुख्य रूप से उद्योग और वाहनों के कारण होता है। ... माध्यमिक कण स्वयं उद्योग और वाहनों द्वारा उत्पन्न होते हैं। सड़क की धूल गर्मियों में महत्वपूर्ण योगदान देती है। ईपीसीए की रिपोर्ट बताती है कि कोयले और डीजल के कण हवा से उड़ने वाली धूल से ज्यादा हानिकारक हैं।

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