The United Nations Environment Programme estimates that desertification is threatening to consumer about one-fourth of the earth's total land area. Land degradation causes desertification which in turn causes global warming and biodiversity.
One quarter of the earth's land is threatened by desertification, according to estimates by the United Nations Environment Programme (UNEP). The livelihoods of over 1 billion people in more than 100 countries are also jeopardized by desertification, as ...