ambient air standard

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noun

the highest concentration of a specific air pollutant at a particular outdoor location, in a specified unit of time, that is not considered hazardous to humans: The ambient air standard for gas X is 3 parts per million per hour.

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Which sentence is correct?

His boss, whom he admires, is waiting to meet with him about the big project.

His boss, who he admires, is waiting to meet with him about the big project.

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Origin of ambient air standard

First recorded in 1970–75

Words nearby ambient air standard

ambidexterity, ambidextrous, Ambien, ambience, ambient, ambient air standard, ambiente, ambient music, ambient noise, ambigram, ambiguity