Yesterday, the World Bank Global Environment Facility announced at a meeting of African leaders in Chad to devote 96 million Euros to the "Great Green Wall of the Sahara" initiative: a barrier of trees 7000 kilometer long and 15 kilometer wide which will be planted across 11 African countries, from Senegal to Djibouti. This Green Wall will have to slow down wind erosion and enhance rainwater infiltration. The idea for this Wall emerged five years ago. In July 2005, President Obasanjo, President of the Federal Republic of Nigeria, proposed to the Fifth Ordinary Summit of the African Union (AU), an initiative for the establishment of a "Green Wall for the Sahara". At the time, the Heads of State requested the African Union Commission (AUC) to facilitate its formulation and implementation. However, because of lackof funds implementation had not yet begun.