Parsa Sheida, Yousefi Masoud, Ansarizadeh Mohammad, Moein Hossein, Delavari Heravi Maryam, Nejadsadeghi Elham, Ghasemi Afsaneh, Habibi Dowlatabad Ali
Department of Environmental and Occupational Health, California State University, Northridge, USA.
Department of Environmental Health Engineering, Mamasani Higher Education Complex for Health, Shiraz University of Medical Sciences, Shiraz, Iran.
Sci Rep. 2025 May 30;15(1):19102. doi: 10.1038/s41598-025-04145-7.
Classification of the environmental status resulting from waste littering has significant importance in evaluating the efficiency of the cleaning system and also in identifying the most polluted areas and priority for pollution control programs. In recent decades, various indexes have been developed for this purpose, of which the Clean Environment Index is one of the most widely used in recent years. The aim of this study was to improve this index for a more accurate assessment of the environment pollution. For this purpose, 25 locations in Tehran metropolis were evaluated in terms of the density of discarded waste in different land-uses. By changes in the classification of the status and its increase from five to eleven categories, the Clean Environment Index was improved and used. The results showed that the average density of litter in the studied locations was 0.198 items/m. Cigarette butts, paper, and plastic constituted 29.85%, 12%, and 38.43% of the litter mass, respectively. While available indexes rank environmental pollution into five categories, make it difficult to compare locations and assess efficiency of cleaning programs, the development of a new index in this study addressed this challenge. The Clean Environment Index classified 56% of the studied locations in moderate status, while the Developed Clean Environment Index provided a wider distribution. Further classification of the pollution status in the new index caused the share of the largest category not exceed 36% of the studied locations. We were able to provide a better comparison between the studied locations by a better distribution of status classification. Developed Clean Environment Index can replace Clean Environment Index to achieve more accurate results.
对垃圾乱扔所造成的环境状况进行分类，对于评估清洁系统的效率、确定污染最严重的区域以及污染控制项目的重点而言具有重要意义。近几十年来，为此目的已开发出各种指标，其中清洁环境指数是近年来使用最广泛的指标之一。本研究的目的是改进该指数，以便更准确地评估环境污染。为此，根据不同土地用途中废弃垃圾的密度，对德黑兰市的25个地点进行了评估。通过改变状况分类并将其从五类增加到十一个类别，清洁环境指数得到了改进并加以应用。结果表明，研究地点垃圾的平均密度为0.198件/米。烟头、纸张和塑料分别占垃圾总量的29.85%、12%和38.43%。虽然现有指标将环境污染分为五类，这使得难以比较不同地点并评估清洁项目的效率，但本研究中开发的新指标解决了这一挑战。清洁环境指数将56%的研究地点归类为中等状况，而改进后的清洁环境指数提供了更广泛的分布。新指标中污染状况的进一步分类使得最大类别的占比不超过研究地点的36%。通过更好地分布状况分类，我们能够在研究地点之间进行更好的比较。改进后的清洁环境指数可以取代清洁环境指数以获得更准确的结果。
