Freewan و.ع.ا. and Alrachidy ع.م. 2021. The negative effects of waste on the urban environment in the city of Khums (Waste to sustainable energy). Journal of Pure & Applied Sciences . 20, 4 (Dec. 2021), 96–102. DOI:https://doi.org/10.51984/jopas.v20i4.1707.