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In page Great Green Wall (Africa):

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Lessons learnt from the Algerian Green Dam[4] and the Green Wall of China led to an integrated multi-sectoral approach.[5] Originally a tree planting initiative, the project evolved into a development programming tool. In 2007, the Conference of Heads of State and Government (CHSG)[citation needed] directed the project to tackle the social, economic and environmental impacts of land degradation and desertification.[6] The countries Burkina Faso, Djibouti, Eritrea, Ethiopia, Mali, Mauritania, Niger, Nigeria, Senegal, Sudan and Chad thereafter created the Panafrican Agency of the Great Green Wall (PAGGW).[2][7]