Acute danger to human life (i.e. death) exists, if the concentration of CO<sub>2</sub> in atmospheric air exceeds _________ percent (by volume).

N

Nisha Gupta • 2.32K Points
Master

Q. Acute danger to human life (i.e. death) exists, if the concentration of CO₂ in atmospheric air exceeds _________ percent (by volume).

(A) 1

(B) 3

(C) 7

(D) 20

Correct : Option (D)

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