Second, cleanup often removes a pollutant from one
part of the environment only to cause pollution in another.
For example, we can collect garbage, but the
garbage is then burned (perhaps causing air pollution
and leaving toxic ash that must be put somewhere),
dumped on the land (perhaps causing water pollution
through runoff or seepage into groundwater), or buried
(perhaps causing soil and groundwater pollution).
其次，清潔從一個經常取消汙染物只導致汙染的一部分的環境在別的。例如，我們可以收集垃圾，但是垃圾然後被燒(或許導致大氣污染和留下必須投入某處)的毒性，傾銷在土地(或許導致水污染通过決賽或滲流到地水裡)，或者埋沒(或許導致土壤和地水汙染)。
