Concentration of traffic air pollutants and influencing metrological factors in Hawassa City roadways, Ethiopia - Yirdaw, Asmare Asrat; Ejeso, Amanuel; Mokie Belayneh, Samrawit; Yohannes, Lamrot; Bezie, Anmut Endalkachew; Beyene, Embialle Mengistie (Frontiers in Public Health, 2025)