ASPHYXIATION occurs when high levels of pollutants are breathed causing exhaustion, shortness of breath, claustrophobia, headache, dizziness, fainting, choking, nausea, and vomit. Even a so-called minor asphyxiation - breathing air in a theater or office building that uses gaseous formaldehyde in the ventilation system to retard molds - produces nausea, claustrophobia and headache in some people.
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