Algeria's 'foggara' irrigation system: How farmers keep oases green

In the bowels of the earth, Abdelhamid inspect a well that channels groundwater to the surface, an ancestral irrigation system known as the foggara that keeps oases growing in the middle of the desert. But it could be a tradtion whose days are numbered: the know-how of the workers in these foggaras is inscribed on the list of Intangible Cultural Heritage in Need of Urgent Safeguarding.