GLOBAL PERSP. - A gigantic wall stretching over thousands of kilometres is being erected in Africa, which has no parallels in human history except the Green Wall of China designed to hold back the Gobi desert. The African fence -- named the 'Great Green Wall', which will run through 11 countries -- is purported to halt the southward advance of the Sahara. And it will be much more than a wall of trees stretching from Senegal to Djibouti. Read More