State Act and Historical Change of Ecoenvironment in Northwest China

Ecological change has been a resultant of both natural changes and human activities.In Chinese history,eco- logical change and deterioration in Northwest China was mainly caused by the later,i.e.state's military-oriented devel- oping strategy,predatory overculivation of land and overexploitation of water resources and resulting intensive relationship of men and land.It is argued that the profound influences of ecological change in the Northwest on regional sustainable e- conomic development and national sociopolitical stability sound an Mann bell for us and remain to be discussed.