Zai Agriculture: A tree grows in the Sahel

While researching desertification for a comment in an upcoming episode, I came across this article from Salon about the West African agricultural technique of Zai.  It is one of the many lessons we can take from different systems of agriculture to build a more sustainable world that is appropriate to the places where they are needed, rather than forcing a particular method developed elsewhere that isn't adapted for the imported region. A tree grows in the Sahel - How the World Works - Salon.com. If you would like to learn more about Yacouba Sawadago, check out the documentary "The Man Who Stopped the Desert". The trailer for the film: https://www.youtube.com/watch?v=Dzah_5y65AU