For certain pollutants with a (n) _______, emissions or ambient quality up to a certain level cause _________ damages.

Question

Quizplus · Accepted Answer

The term "threshold" specifically refers to a level above which damage or harm occurs. Therefore, emissions or ambient quality below the threshold would not cause any damage. The word "severe" in option C and D is too extreme and not necessarily implied by the concept of a threshold. Option B refers to ambient concentration as the determining factor, which is not necessarily true for all pollutants that have a threshold.

For Certain Pollutants with a (N) _______, Emissions or Ambient