In the cities of the U.S.and in other industrialized cities of the world a main cause of air pollution overall is from
A)trucks and automobiles.
B)warehouses.
C)port activities.
D)diesel engines from trains and barges.

Question

Quizplus · Accepted Answer

Trucks and automobiles are a major cause of urban air pollution due to their high emissions of pollutants such as nitrogen oxides, particulate matter, and carbon monoxide. Other sources such as warehouses, ports, and diesel engines from trains and barges contribute to air pollution as well, but the scale of emissions from vehicles is much larger.

In the Cities of the U