Dry ice is fundamentally a solid form of CO2, typically used to preserve and transport substances that need to remain cold or frozen, and as Michelle Wilson, Marketing Manager at Analox Sensor Technology, stressed, "It can be a very serious hazard in a small space that isn't well ventilated, as dry ice undergoes a process of sublimation in normal atmospheric conditions. This will increase the concentration of CO2, which is a toxic gas and hard to detect. Exposure to elevated levels can cause several physiological effects such as drowsiness, dizziness and even death in extreme cases."
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