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Desertification and drought are issues of a global dimension in that they affect all regions of the world, and that joint action by the international community is needed to address them, particularly in Africa. The United Nations General Assembly declared 17 June to be "World Day to Combat Desertification and Drought" by its  adopted in December 1994.

UNESCO  provides scientific expertise thought its Intergovernmental Hydrological Programme (IHP) and its Man and the Biosphere programme (MAB). 

Dryland ecosystems, which cover over one third of the world¡®s land area, are extremely vulnerable to overexploitation and inappropriate land use. Desertification is the degradation of land in arid, semi-arid and dry sub-humid areas; it is caused primarily by human activities and climatic variations, and affects the world's poorest. The decisions we make every day on what to buy, eat, drink, wear and how to travel ¨C all have an impact on land resources.

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