Great Green Wall
The Great Green Wall or 'Great Green Wall of the Sahara and the Sahel Initiative' (French: Grande Muraille Verte pour le Sahara et le Sahel) is a planned project to plant a wall of trees across Africa at the southern edge of the Sahara desert as a means to prevent desertification. It was developed by the African Union to address the detrimental social, economic and environmental impacts of land degradation and desertification in the Sahel and the Sahara.