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Why farts can catch fire

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Your middle school humor is deeply validated by cold, hard chemistry. The bacteria in your intestines digesting food produce a cocktail of gases, primarily nitrogen, carbon dioxide, methane, and hydrogen. The latter two are highly combustible. Because of this, lighting a fart on fire will genuinely produce a burst of flame. It is a party trick that comes highly discouraged by medical professionals.

Why farts can catch fire
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