AP Environmental Scienceeasymcq1 pt
Excess nitrogen from fertilizer runoff most directly causes
A.eutrophication of downstream waters
B.ozone depletion
C.soil salinization
D.thermal inversions
Explanation
Core Concept
Runoff nitrogen (and phosphorus) fuels algal blooms; their decomposition depletes oxygen, creating dead zones like the Gulf of Mexico's.
Correct Answer
Aeutrophication of downstream waters
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