Answer
(c)
Work Step by Step
Primary pollutants are emitted directly from a source.
Tropospheric ozone is a secondary pollutant, formed when $NO_x$ and VOCs react in sunlight.
The answer is (c).
Environmental Science for AP* (2nd Edition)
by Friedland, Andrew J.; Relyea, Rick
Published by
W. H. Freeman
ISBN 10:
1464108684
ISBN 13:
978-1-46410-868-6
Chapter 15 - AP Environmental Science Practice Exam - Section 1: Multiple-Choice Questions - Page 549: 5
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