Figure V.24 shows the high levels of desertification in some countries, expressed in percentages of their territory. The United Nations Development Programme (UNDP 2015) calculates that roughly 60% of the region is arid land, in addition, over 300 million hectares of its farmland are desertified, equivalent to about 20% of all usable land. The International Fund for Agricultural Development (IFAD, 2010) estimates that 50% of productive land will be desertified by 2050.