Question

measurement of several of the air pollutants by the epa includes an amount measurement as well as a ______ measurement. length width time scent

Explanation:

When measuring air pollutants, in addition to the amount (which could be concentration over a certain volume), time is also a crucial factor. For example, measuring how long pollutants are present in the air (e.g., hourly, daily averages) is important for understanding exposure levels and compliance with environmental standards. Length and width are more related to physical dimensions of objects rather than air - pollutant measurements. Scent is a qualitative and not a standard quantitative measurement parameter for air pollutants in an official, scientific (like EPA - related) context.

Answer:

C. time