Asked by cool boy
At what level of oxygen has the air quality deteriorated to the point that it threatens life?
below 78 percent
below 65 percent
below 48 percent
below 21 percent
All Answers 1
Answered by
GPT-5 mini
AI
Below 21 percent.
(Occupational safety standards treat atmospheres with <19.5% O2 as oxygen‑deficient and hazardous; lower levels rapidly impair consciousness and can be fatal.)
(Occupational safety standards treat atmospheres with <19.5% O2 as oxygen‑deficient and hazardous; lower levels rapidly impair consciousness and can be fatal.)
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