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FOUNDATIONS FOR CHANGING NATURAL ENVIRONMENT IN NORTHWEST CHINA

Gao Qingyon Zhao Yiyu(The Ministry of Forestry of China) (Ningxia Agricultural College)  
In order to exploit the north-western area, we must resolve the problem of natural environment.In this paper,the authors made a review of the history abont it, expounded the scientific basis for changing the north-western natural environment; formed an estimate of the strategic aim, the key items, the overall arrangement and the benefits to construct Sanbei' shelter belts in the north-western area of China.
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