填空题

Reforestation is forbidden in order not to reduce erosion and sediments in the rivers in some areas, otherwise "dam-pond system" may have to be stopped.

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NG
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Windbreaks are planted along the sand-covered coastal belt to reduce the movement of sand blowing inland by wind action.
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Waterlogged fields and coastal sand storms make people in parts of Guangdong Province introduce the dam-pond system to raise fish in the pond and grow vegetables on tops of the dam around the pond.
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