The single major source for photochemical reactants in the United States are
A)steel mills and the agricultural industry.
B)electrical generation stations.
C)automobiles.
D)rapid transit,buses,and excessive use of light rail systems.
E)solar panels and wind turbines.

Question

Quizplus · Accepted Answer

According to the Environmental Protection Agency (EPA), automobiles are the single major source for photochemical reactants in the United States. This is due to the emissions of Volatile Organic Compounds (VOCs) and Nitrogen Oxides (NOx) from vehicle exhaust which can react with sunlight to produce ground-level ozone and other harmful pollutants.

The Single Major Source for Photochemical Reactants in the United