‘Restoring the land is a matter of survival.’ The semi-arid area runs the width of Africa south of the Sahara Desert. It faces droughts and desertification, and is a stark example of how the climate crisis and land degradation cause conflict and migration. It follows Modja through the Sahel, meeting those directly affected by land degradation and using music to raise global awareness of this ground-breaking initiative. AdvertisementThe Great Green Wall film poster‘Thirty million people survive on Lake Chad’s ecosystem. ‘We are now in a race against time,’ Modja says in a speech at the UN in New York.