Environmental Effects of Exhaust Emission from Spark Ignition Engine Fuelled with 4% HDPE Pyrolysis Oil-Gasoline Blend: Artificial Neural Network Modelling. International Journal of Inventive Engineering and Sciences (IJIES), [S. l.], v. 13, n. 4, p. 4–10, 2026. DOI: 10.35940/ijies.E8185.13040426. Disponível em: https://journals.blueeyesintelligence.org/index.php/ijies/article/view/1066.. Acesso em: 13 may. 2026.