Kira, E. S., & Komba, S. C. (2015). Comparison between the Understanding Levels of Boys and Girls on the Concepts of Environmental Degradation, Meteorology and Climate Change in Tanzanian Secondary Schools. Journal of Education and E-Learning Research, 2(4), 79–86. Retrieved from http://www.asianonlinejournals.com/index.php/JEELR/article/view/107