Carbon dioxide, a common by-product of breathing, is lethal to humans in larger doses. The standard level of CO2 that a human can live under comfortable is around <600ppm but in many cases higher levels of CO2 are exposed to humans and can cause problems ranging from headaches to death depending on the concentration of the gas.
We can’t stress enough just how dangerous confined spaces are. Not only are areas in an enclosed environment uncomfortable for the person inside, but they’re also often hiding hidden dangers that can severely affect the health of those within or – in the worst case scenario – can cause death.
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