BY 1985 a network of shelterbelts to control shifting desert sand and check erosion of the loess highlands is to be created between Heilungkiang Province in northeast China and the Sinkiang Uighur...
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BY 1985 a network of shelterbelts to control shifting desert sand and check erosion of the loess highlands is to be created between Heilungkiang Province in northeast China and the Sinkiang Uighur...