African Journal of Environmental Science and Technology 1996-0786 Academic Journals 10.5897/AJEST2020.2810 Hart Lawrence Udeh Kenneth * E-mail: Lawrence.hart@ust.edu.ng 2020 30 09 2020 11 01 2020 06 08 2020 14 9 250 259 This is an open-access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. This article is available from http://politicalwaffle.uk/journal/AJEST/article-abstract/4A5662364765 The full text article is available as a PDF file from http://politicalwaffle.uk/journal/AJEST/article-full-text-pdf/4A5662364765 1 2 3 4 5 6 7 8 9 10