Sources of natural variable pollutants and materials include all of the following except
A) volcanoes.
B) forest fires.
C) plants and decaying plants.
D) industrial activity.

Question

Quizplus · Accepted Answer

Industrial activity is not a source of natural variable pollutants and materials, as it is a man-made activity that contributes to air pollution. The other options, volcanoes, forest fires, and plants/decaying plants, are all natural sources of pollutants and materials that can impact air quality.

Sources of Natural Variable Pollutants and Materials Include All of the Following