AP Environmental Sciencehardmcq1 pt
A carbon atom locked in limestone could return to the atmosphere most directly through
A.volcanic release from subducted carbonate rock
B.photosynthesis
C.nitrogen fixation
D.evapotranspiration
Explanation
Core Concept
Subducted limestone carbon returns as volcanic CO₂ over geologic time, while acid weathering of carbonates also releases it.
Correct Answer
Avolcanic release from subducted carbonate rock
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