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Changing air quality in Delhi, India: determinants, trends, and policy implications

机译：印度德里空气质量的变化：决定因素，趋势和政策影响

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Air pollution is a major environmental problem in urban areas worldwide. Delhi, the capital city of India, is no exception to the universal pattern of deteriorating urban air quality with concentration of pollutants being well above the recommended WHO levels. The magnitude and urgency of the problem as a global environmental issue needs a systematic understanding of the potential causes of pollution and their contribution to air quality. In the present study, ambient air quality data (1987-2006) of SO_2, NO_2, SPM, and RSPM were analyzed to asses the changing air quality in the study area and to evaluate the effect of measures taken to control it. The primary data were collected from 1,583 households to examine the relationship between outdoor and indoor pollution level. Based on the data, the current study concludes that despite the implementation of different pollution-controlling measures, the pollutants, especially the paniculate pollutants, were well above the standard limits set by CPCB. Integration between technological and social approach of urban planning is required to mitigate and manage urban environmental problems in sustainable manner.
机译：空气污染是全世界城市地区的主要环境问题。印度的首府德里也不例外，普遍的城市空气质量恶化模式是污染物浓度远高于世卫组织建议的水平。作为全球性环境问题，该问题的严重性和紧迫性需要系统地了解污染的潜在原因及其对空气质量的影响。在本研究中，分析了SO_2，NO_2，SPM和RSPM的环境空气质量数据（1987-2006年），以评估研究区域空气质量的变化并评估采取控制措施的效果。收集了1,583户家庭的主要数据，以研究室外和室内污染水平之间的关系。根据这些数据，当前的研究得出的结论是，尽管采取了不同的污染控制措施，但污染物（尤其是颗粒状污染物）仍远远超过了CPCB设定的标准限值。需要以城市规划的技术方法与社会方法结合起来，以可持续的方式减轻和管理城市环境问题。

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