Question

Exposure to which poisonous gasses is fatal for humans.

Answer 1

Answer:

Carbon monoxide poisoning

Of particular importance are the exhaust emissions of cars so that in enclosed parking lots carbon monoxide levels may even reach lethal levels. Tobacco smoke and intense traffic are primarily responsible for human exposure to this substance.

Answer 2

Answer:

Hydrogen sulfide

Explanation:

Hydrogen sulfide poisoning is responsible for more animal deaths than any other gas. At concentrations of 250 ppm and above, hydrogen sulfide causes irritation of the eyes and respiratory tract and pulmonary edema. Hydrogen sulfide concentrations above 500 ppm cause strong nervous system stimulation and acute death.

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