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health

In Korean winters, one safety hazard needs special care indoors with the heating on. In an enclosed space with a combustion device, what's the danger?

Carbon monoxide (gas) poisoning
In winter, incomplete combustion from gas boilers, heaters, or car heaters in enclosed spaces can cause carbon monoxide poisoning — dangerous because it's colorless and odorless. Ventilate boiler rooms, install detectors, and air out during camping or sleeping in a car. If headache, dizziness, or nausea come together, ventilate immediately and call 119.

Carbon monoxide forms when fuel — gas, coal briquettes, or a car engine — burns incompletely in a space without enough oxygen, and because the gas has no color or smell, people can be poisoned without any warning sign until symptoms like headache, dizziness, and nausea set in. Enclosed spaces with gas boilers, portable heaters, or a running car engine are the classic risk points in Korean winters.

Sunburn requires UV exposure, not combustion, and altitude sickness comes from thin air at high elevation, so neither relates to the indoor-heating hazard described here.

Because the danger is invisible, installing a carbon monoxide detector near sleeping areas and boiler rooms is a cheap safeguard, and if headache and nausea strike together indoors, ventilating immediately and calling 119 can be lifesaving.

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