关键词: 荒漠化, 世界, 中国

Abstract: Desertification is an important envlronmental problem in the world today,there are 900 million people In 100 countrle、exposed to desertification.In 1977 the concept of desertification was defined by UNCOD as follows: "Deseartification is the diminution or destruction of the biological potential of land,and can lead ultimately to desert-like conditions.It is an aspect of the widesPread deterioration of ecosyostem,and has adminished or destroed the biological potential,i.e.plant and animal production,for multiple use purposes at a time when increased.Productivity is needed to support growing pnpulation in quest of development."