VIDEO ON DESERTIFICATION
Arabic gum (Acacia senegal)
http://www.dailymotion.com/video/x2lt9r3_turning-the-tide-on-desertification-in-africa-7min43sec-version_news
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Author: Willem Van Cotthem
Honorary Professor of Botany, University of Ghent (Belgium). Scientific Consultant for Desertification and Sustainable Development.
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DESERTIFICATION 