Great green wall: Villagers' defence against desert

Great green wall: Villagers' defence against desert
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Climate change is causing the Sahel Desert to grow, but villagers are planting a vast wall of trees in a bid to save their land.
Three years ago, Al Jazeera visited the so-called “Great Green Wall”.

Al Jazeera’s Nicolas Haque returned to Mbar Toubab in Senegal to see whether or not it is working.

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