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

AP Environmental Sciencemediummcq1 pt

A city in a mountain valley suffers winter smog despite little traffic. The likely cause is

A.thermal inversions trapping wood smoke and emissions

B.strong ocean winds

C.an ozone hole overhead

D.too much rainfall

Explanation

Core Concept

Valley inversions cap cold air, concentrating whatever is emitted — even modest sources build to hazardous levels for days.

Correct Answer

Athermal inversions trapping wood smoke and emissions

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