Which of the following is responsible for about half of all air pollution in the United States?
A)coal-fired power plants
B)railroad trains
C)cars,trucks,and buses
D)paper mills and steel mills

Question

Quizplus · Accepted Answer

Cars, trucks, and buses are responsible for about half of all air pollution in the United States due to the emissions from their exhausts. Coal-fired power plants, paper mills, and steel mills also contribute to air pollution, but to a lesser extent than transportation vehicles. Railroad trains contribute a small proportion to overall air pollution levels.

Which of the Following Is Responsible for About Half of All