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Chapter 3: Chlorine and Its Compounds
— The green gas that cleans our water, bleaches our clothes, and fights our germs. —
Why this matters
(I once asked a class, "What keeps your drinking water safe?" They shrugged. Then I told them: a green gas called chlorine. It is added to water at very low concentrations to kill bacteria that would otherwise cause diseases like cholera and typhoid. It is one of the greatest public health advances in human history. And yet, the same gas was used as a w
