How Tear Gas Works: A Rundown of the Chemicals Used on Crowds

There are two broad types of tear gas — and they’re both engineered to cause pain

Photo: Guillermo Arias/Getty Images

By Angus Chen

Before the tearing, the choking and the pouring mucus, tear gas burns. It causes searing pain in the eyes, skin, lungs and mouth — or anywhere it touches. “It can be overwhelming and…

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