OVERGRAZING HAS CONTRIBUTED TO DESERTIFICATION
image
FIGURE 7.16 Semiarid grazing lands around the world have been converted to desertlike ecosystems through desertification, a process that is increasing the extent of low-production wastelands. The contribution of livestock to desertification of the Sahel region of northern Africa, pictured here, is well studied.
(Mark Edwards/stillpictures/Aurora Photos)