University Of Tehran Press Pollution 2383-451X 11 3 2025 07 01 PM2.5-Related Mortality and Years of Life Lost in Megacity of Ahvaz, Iran 812 827 101001 10.22059/poll.2025.383526.2596 EN Yusef Omidi Khaniabadi Occupational and Environmental Health Research Center, Petroleum Industry Health Organization (PIHO), Ahvaz, Iran Hasan Raja Naqvi Department of Geography, Faculty of Sciences, Jamia Millia Islamia, New Delhi, India Pierre Sicard ACRI-ST, Route Du Pin Montard, Biot, France INCDS Marin Drăcea, 128 Eroilor Bvd, Voluntari 077030, Romania Pouran Moulaei Birgani Family Health Research Center, Petroleum Industry Health Organization (PIHO), Ahvaz, Iran Alessandra De Marco ENEA, Via Anguillarese, 301, Rome, Italy Sina Fathi Rad Department of Medicine, School of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran Khatereh Anbari School of Medicine, Social Determinants of Health Research Center, Lorestan University of Medical Sciences, Khorramabad, Iran Rajab Rashidi Professor of Occupational Health Engineering, Department of Occupational Health, Environmental Health Research Center, School of Health and Nutrition, Lorestan University of Medical Sciences, Khorramabad, Iran Mahsa Moradi Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran Journal Article 2024 10 10 The aims of the current study were to assess the variations in PM2.5 concentrations in Ahvaz (Iran), and related mortality and years of life lost in 2019 and 2020. Backward wind trajectories through HYSPLIT model were obtained. The hourly in-situ data of PM2.5 concentrations were transformed into daily averages. The integrated exposure-response function, relative risk, and baseline incidence values were used for estimation attributable mortality, years of life lost, and loss of life expectancy in Ahvaz. The aerosols variation showed that PM2.5 reduced in post-lockdown (22 April – 21 May, 2020) compared to pre-lockdown phase and same time in 2019. The results of HYSPLIT model illustrated that dust from the Arabian Desert region especially Iraq can travel long distances and contribute to air particulate pollution in Iran. The number of premature deaths for non-accidental causes (37.5 and 31.2), M-IHD (12.4 and 10.3), M-COPD (29 and 28.2), and M-LC (16.2 and 11.25) for exposure to PM2.5 above 10 µg m-3 in people were obtained in 2019 and 2020. The years of life lost declined by 16% in 2020, and exposure to PM2.5 reduced the life expectancy 0.69 and 0.44 years respectively in 2019 and 2020. Previous conducted studies have provided quantitative estimates of the ability of green infrastructure to ameliorate urban air quality (e.g., PM2.5) at city scale worldwide. https://jpoll.ut.ac.ir/article_101001_52246d8f5ae1641565a1b3a7e330947e.pdf