Comparative Research Progress on Hydrogeological Potential of Major Geological Complexes : A Case Study of Togo and ChinaComparative Research Progress on Hydrogeological Potential of Major Geological Complexes : A Case Study of Togo and China. Am. J. Environ. Clim. 2025;4(3):135-154. doi:10.54536/ajec.v4i3.6039