AP Environmental Sciencemediummcq1 pt
Water vapor acts as a climate FEEDBACK because
A.warming evaporates more water, amplifying the warming
B.humans emit water vapor directly
C.it cools the planet as it rises
D.it never changes concentration
Explanation
Core Concept
Human emissions do not control atmospheric water directly, but warmer air holds more vapor, which traps more heat — a positive feedback on any warming.
Correct Answer
Awarming evaporates more water, amplifying the warming
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