Result of severe and accelerated erosion caused by the strong North and North-east winds in the Horquin Desert, Inner Mongolia. The sand is carried and accumulated southwards, where people suffer from shifting sand dunes. - - Afforestation, Research and Dev. in the Three-North Region: GCP/CPR/009/BEL. Since 1978 China has been implementing a massive rehabilitation programme aimed at afforestation of more than 35 million h a. over a 73-year period in the arid and sub-arid belt of Northwest, North and Northeast China, the so-called Three-North Region. T