为了保持充足的水供应，凤凰城批准了一项极具争议的回收水的活动，以此补充地下地下水并试图劝阻过度消费。

To keep up a sufficient water supply, Phoenix is adopting an aggressive campaign to recycle water, replenish groundwater and try to dissuade over-consumption.

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如地下水中遇到的，它应保持低于管的方式抽水，直到管道已得到令人满意的测试，并回填。

Where ground water is encountered, it shall be kept below the pipe by means of pumping until the pipe has been satisfactorily tested and backfilled.

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树木的减少扰乱了生态系统，因为固定表层土壤，保持旱季降雨，净化地下水和将二氧化碳转化为氧气都需要树木。

The loss of trees upsets the ecosystem as trees are necessary to build topsoil, maintain rainfall in dry climates, purify underground water and to convert carbon dioxide to oxygen.

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