Which two factors contribute the most to high levels of air pollution?
A) deforestation and acid rain
B) heavy industry and traffic congestion
C) heavy industry and deforestation
D) traffic congestion and desertification

Question

Quizplus · Accepted Answer

Heavy industry and traffic congestion are the two factors that contribute the most to high levels of air pollution. Heavy industry emits pollutants such as particulate matter, nitrogen oxides, and sulfur dioxide, while traffic congestion emits exhaust fumes that contain carbon monoxide and volatile organic compounds. The combination of these two sources creates a significant amount of air pollution in urban areas. Deforestation and acid rain, heavy industry and deforestation, and traffic congestion and desertification can also contribute to air pollution, but not to the same extent as heavy industry and traffic congestion.

Which Two Factors Contribute the Most to High Levels of Air