Which of the following is NOT considered an air contaminant?

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Multiple Choice

Which of the following is NOT considered an air contaminant?

Explanation:
Air contaminants are substances in the air that reduce air quality or pose health risks. Water vapor is a natural part of air and, while humidity can affect comfort and mold risk, it isn’t treated as a pollutant in the same sense as particulates or harmful gases. Dust particles and pollen are particulates that can irritate the lungs and trigger allergies, so they are considered contaminants. Nitrogen, on the other hand, makes up the majority of the atmosphere and is largely inert at normal indoor and outdoor levels, so it does not count as an air contaminant.

Air contaminants are substances in the air that reduce air quality or pose health risks. Water vapor is a natural part of air and, while humidity can affect comfort and mold risk, it isn’t treated as a pollutant in the same sense as particulates or harmful gases. Dust particles and pollen are particulates that can irritate the lungs and trigger allergies, so they are considered contaminants. Nitrogen, on the other hand, makes up the majority of the atmosphere and is largely inert at normal indoor and outdoor levels, so it does not count as an air contaminant.

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