AP Environmental Scienceeasymcq1 pt

Carbon monoxide is dangerous because it

A.binds hemoglobin more strongly than oxygen
B.burns the lungs on contact
C.causes acid rain
D.depletes the ozone layer

Explanation

Core Concept

CO occupies hemoglobin's oxygen sites, so blood carries less oxygen — odorless, colorless, and often lethal.

Correct Answer

Abinds hemoglobin more strongly than oxygen

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