Desertification affects about one-sixth of the world's population, 70 percent of all drylands, and one-quarter of the total land area in the world. The most obvious impact of desertification, in addition to widespread poverty, is the degradation of 3.3 billion hectares of the total area of rangeland, a decline in soil fertility and soil structure, and the degradation of irrigated cropland.
The Convention to Combat Desertification (CCD) was formally adopted on 17 June 1994, and opened for signature at a ceremony in Paris on 14-15 October 1994. This first post-Rio sustainable development convention is notable for its innovative approach in recognizing: the physical, biological and socioeconomic aspects of desertification; the importance of redirecting technology transfer so that it is demand driven; and the involvement of local populations in the development of national action programmes. The core of the Convention is the development of national and subregional/ regional action programmes to combat desertification. These action programmes are to be developed by national governments in close cooperation with donors, local populations and non-governmental organizations (NGOs).
To date, the Convention has 115 signatories and has been ratified by 25 countries. The CCD will enter into force 90 days after the receipt of the 50th instrument of ratification.