Modelling of Air Pollution Dispersion in the Utilization of Used Oil as a Fuel Purwanto Purwanto, Arif Susanto, Alifah Ainun Hasari, Edi Karyono Putro and Anthony Andorful Manuel E3S Web Conf., 503 (2024) 04005 Published online: 20 March 2024 DOI: 10.1051/e3sconf/202450304005