University of Guilan Caspian Journal of Environmental Sciences 1735-3033 21 5 2023 12 01 Assessment of indoor air quality for closed cafés in Baghdad City, Iraq 1279 1287 7430 10.22124/cjes.2023.7430 EN Mohammed Abdul Bari Fezea Department of Biology, College of Education for Pure Sciences (Ibn Al-Haitham), University of Baghdad, Iraq Maha A. Gathwan Department of Biology, College of Education for Pure Sciences (Ibn Al-Haitham), University of Baghdad, Iraq Journal Article 2024 01 13 The phenomenon of young people frequenting closed cafes spread in Baghdad to smoke hookahs and cigarettes has increased. This phenomenon is associated with unemployment, an increase in leisure time and the deterioration of economic conditions. This phenomenon has an impact on indoor air quality and exposes workers to the risk of exposure to various pollutants, including particulate matter, therefore, we examined some indicators (PM_2.5, PM₁₀) IAQ for a month in summer and another month in winter in six different locations in the Rusafa district. PM_2.5 and PM₁₀ concentrations, relative humidity (RH) and temperatures were measured using (Multifunction Air Quality Detector BENETECH -China). The results showed an increase in temperatures inside closed cafes, exceeding the recommended limits, and regardless of the seasonal fluctuations, the average concentrations of both PM_2.5 and PM₁₀ inside closed cafes for the months of August and December exceeded the daily and annually PM standards recommended by World Health Organization for both PM_2.5 and PM₁₀ concentrations were higher in summer than in winter were the most of young people enjoy a long holiday.  The peak of PM_2.5 and PM₁₀ concentrations also occurred during evening rush hour, more than the highest readings in the morning periods. https://cjes.guilan.ac.ir/article_7430_d3424dfc7f368c1c0db6d39cbb337328.pdf