The 1991 Pinatubo eruption in the Philippines caused global temperatures to drop over the next year. What caused this phenomenon?
A) The eruptive cloud destroyed parts of the Earth's protective ozone layer.
B) Sulfur dioxide was released and formed aerosols in the atmosphere.
C) Radioactive atoms blown into the atmosphere froze as they decayed.
D) The eruption added large amounts of carbon dioxide to the atmosphere.
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