“…The literature revealed that some classes of waste can be converted into useful products, and these include kitchen and organic waste, metal, glass, plastic, and paper (Ojewumi et al, 2019a;Ojewumi et al, 2019b;Ojewumi et al, 2019c;Ojewumi et al, 2020). They can also be categorized based on how dangerous they are to the general human population (Wanjohi, 2018;Subedi, 2019;Ursua, 2019), and this includes but is not limited to, radioactive waste material, inflammable material, and also materials that have fatal consequences when exposed to human beings.…”