نوع مقاله : مروری
نویسندگان
1 دانشگاه تهران ، دانشکده کشاورزی و منابع طبیعی
2 رئیس گروه آلودگی هوا، سازمان حفاظت محیطزیست
3 استادیار مدعو دانشگاه آزاد اسلامی، واحد تهران غرب
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
According to the World Bank report, air pollution is the fourth leading cause of death globally, accounting for one in every ten deaths. Air quality management policy-making began in the 1950s in the United Kingdom and the United States. In Iran, the first air quality management directive was issued in 1975 and has undergone modifications over the past 50 years. This study first reviews all enactments and laws related to air quality management, identifies their main themes, and estimates the extent of their overlap. Subsequently, to assess the effectiveness of these policies, the time series of concentrations for six criteria air pollutants—CO, NO₂, SO₂, PM₂.₅, PM₁₀, and O₃—from three air quality monitoring stations in Tehran over a 10-year period were plotted. The best-fit trend lines were applied and compared with the nationally enacted policies. The results of this analytical study indicate that the Clean Air Law covers more than 77% of air quality management policies, demonstrating greater comprehensiveness compared to previous laws and enactments. Furthermore, analysis of the pollutant concentration time series reveals that sulfur dioxide (SO₂) concentrations have shown a consistent declining trend over the past decade, decreasing by more than 60%. This reduction can be attributed to the implementation of the 2014 regulation on fuel quality standardization. Additionally, given the increasing trend in ozone (O₃) concentrations, it is anticipated that specific policy-making for ozone control will become necessary in the near future.
کلیدواژهها [English]
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