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caighdeán screamhuisce
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environ.
地下水水质
地下水占地球可用淡水资源的95%;超过半数的地球人口依靠地下水作为饮用水源。这种看不见的资源容易受到污染和过度开采,为有效节约地下水资源,必须整合土地使用和水资源管理。
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