就像物理的浪费和垃圾，有害的和没用的数据会降低性能和存储能力，并且要求昂贵的处理能力，从而污染了我们的数字环境。
Like physical waste and trash, unwanted and unused data also pollutes the digital environment by degrading the performance and capacity of storage systems and requiring costly disposal.
为防止进一步的环境侵害，垃圾填埋场附近范围的土地及地下水均被要求进行处理。
To prevent further environmental damage, both ground and groundwater in the vicinity of these landfills often require treatment.
如城市生活垃圾处理、处置系统的决策，人们要求的目标不仅仅是费用最低。
For example, in the decision on municipal domestic garbage disposal system, our goals are not limited to the lowest cost.
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