I saw on a Real Life Lore Video that there is a plan to plant a wall of trees across Africa along the southern border of the Sahara Desert. The hope is these trees will stop the spread of the desert into the semi-arid lands bellow. Why wouldn’t the desert just overtake the trees anyways?
Link to the original video: https://youtu.be/Zjy_JH1aaqU
In: Earth Science
Deserts dont simply expand just because its hot and dry. One main reason is the loss of soil – without vegetation, soil and nutrients get blown away, and the ground looses its ability to hold water.
Trees protect the ground from erosion, provide plant matter that decays into new soil, and can protect the vegetation further inland from the desert.
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