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Full Version: [Sci-Am] Why Are Police Using a World War I–Era Chemical Weapon on Civilians?
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Why Are Police Using a World War I–Era Chemical Weapon on Civilians?


Most people think tear gas is relatively harmless, but we know very little about its long-term effects on human health and the environment



-- Read more on ScientificAmerican.com


https://www.scientificamerican.com/artic...civilians/