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Loss of coveting plants and soil may change the climate and even bring about flooding rain in the affected area.

【参考答案】

N

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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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Agroforestry is the combination of______ methods to restore degraded lands to productivelands developed and tested by research scientists.