Environmental Science for AP* (2nd Edition)

Published by W. H. Freeman
ISBN 10: 1464108684
ISBN 13: 978-1-46410-868-6

Chapter 14 - AP Environmental Science Practice Exam - Section 1: Multiple-Choice Questions - Page 514: 6

Answer

E

Work Step by Step

The removal of bacteria takes place in the primary and secondary treatment steps. Therefore, the answer is E.
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