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In small doses, breathing cat urine does not pose a risk to most people. However, in concentrated amounts found in poorly ventilated areas, ammonia fumes produced by cat urine can cause a number of serious symptoms after long-term exposure. These symptoms may include burning and watering of the eyes, coughing, wheezing, headache, and nausea, among others. The World Health Organization considers ammonia to be a possible carcinogen, meaning that inhalation of these fumes may be linked to cancer growth.

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13y ago

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