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

AP Environmental Sciencemediummcq1 pt

Why is indoor air sometimes MORE polluted than outdoor air?

A.Sealed buildings trap emissions from materials and appliances

B.Outdoor air never enters homes

C.Indoors is always cleaner

D.The sun purifies indoor air

Explanation

Core Concept

Energy-efficient buildings trade ventilation for insulation, so indoor sources accumulate to levels outdoor breezes would disperse.

Correct Answer

ASealed buildings trap emissions from materials and appliances

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