I grew up Jewish in the Naqab (Hebraized as Negev). As a child I enjoyed picnics in the Yattir forest, located in the northern Naqab. I asked how it could be that the man-made forest of Yattir is thriving, yet there were no natural forests in the surrounding area. I was told that it was because of the black goats of the Bedouin. They ate all the vegetation, making the land a desert.