Apentix/AP Environmental Science/Unit 7: Atmospheric Pollution/Question
AP Environmental Sciencemediummcq1 pt

Which statement about stratospheric vs tropospheric ozone is correct?

A.Stratospheric ozone protects; tropospheric ozone harms
B.Both are always harmful
C.Both are always beneficial
D.They are unrelated molecules

Explanation

Core Concept

High ozone absorbs UVB (good); ground-level ozone is a respiratory irritant (bad) — same molecule, opposite roles by altitude.

Correct Answer

AStratospheric ozone protects; tropospheric ozone harms

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