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The Great Green Wall: Scientists fight desertifications with trees
Desertification is a major problem in sub-Saharan Africa. It's caused thousands of people to leave their homes in search of water and grazing land. But a project launched by the African Union in 2007 is now finally starting to pay off. Usman Aliyu Uba has all those details. #Greenwall, #Senegal, #GrazingLand
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