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Desertification is caused by several factors including drought, overgrazing by nomadic herders, and subsistence farming on marginal land, which can lead to soil depletion and leaching that removes minerals and nutrients needed for plants to thrive. When soil quality is degraded, vegetation dies off leaving barren land that is at risk of becoming a desert over time if degradation continues without measures to improve soil health and limit activities that strip the topsoil.Read less