Air pollution in urban areas is caused primarily by emissions from automobiles and secondarily by emissions from electric power plants and heavy industries.

Question

Quizplus · Accepted Answer

Automobiles are a major source of air pollution in urban areas due to the emissions of pollutants like nitrogen oxides and particulate matter. Electric power plants and heavy industries also contribute, but typically to a lesser extent in urban settings.

Air Pollution in Urban Areas Is Caused Primarily by Emissions