The eruption of Mt. Pinatubo in 1991 produced few atmospheric effects.

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The eruption of Mt. Pinatubo in 1991 produced a significant atmospheric effect. The eruption injected large amounts of sulfur dioxide gas into the stratosphere, which combined with water vapor to form sulfate aerosols. These aerosols reflected sunlight back into space, causing a cooling effect on the Earth's surface for several years. The eruption is estimated to have lowered global temperatures by about 0.5°C (0.9°F) for a period of two years.

The Eruption of Mt