Prof. BLATCHLEY: So there are peroxide chemicals that are used in addition to chlorine, and that's usually how they're added.

教授布拉·奇利：除了使用氯，那里也有过氧化物的化学品，这就是他们通常添加的。

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During the final stage, the water is disinfected - by the addition of chlorine, hydrogen peroxide and other chemicals and by running it past ultraviolet lights.

在最后一个步骤中，水经过氯、过氧化氢和其它化学品消毒，并且经过紫外线灯消毒。

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Chlorine sodium hypochlorite calcium hypochlorite and hydrogen peroxide are commonly used as bleaches.

氯、次氯酸钠、次氯酸钙和过氧化氢通常用作漂白剂。

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But the industry has a large offsetting advantage: It is still rebounding from a shakeout a few years ago after environmentalists forced paper companies to stop using chlorine as a bleaching agent (many shifted to supposedly greener hydrogen peroxide).

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