Great green wall: Villagers' defence against desertification.
Al Jazeera meets Senegalese in a race against effects of climate change.
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 it is working.
Watch the video here
3 December 2019