Question Detail
Question
The presence of a substance which does not cause harm to the environment is called
Correct Answer
Option B is the correct answer.
Detailed Explanation
Contamination refers to the presence of a substance (a contaminant) where it shouldn't be or at levels above normal, but it doesn't necessarily cause harm. Pollution implies that the substance causes harm or damage.
Hint
Which term means the presence of a substance, but without implying it is harmful?