The 1991 eruption of Mt. Pinatubo caused global cooling because it
A. produced sulfuric acid droplets in the atmosphere that blocked incoming sunlight.
B. added ozone to the ozone layer.
C. caused increased evaporation of cool water vapor from the oceans.
D. produced very strong winds that cooled the continents.
Answer: A
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A. 8 B. 12 C. 4 D. 16
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