What is the primary gas blamed for climate change according to the passage?

• Carbon dioxide

• Sulfur dioxide

• Methane

• Nitrous oxide

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Remembering

Which volcanic eruption in the twentieth century caused the largest aerosol disturbance of the stratosphere?

• Mount Pinatubo

• Krakatau

• Tambora

• Mount St. Helens

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Remembering

Volcanic gases like sulfur dioxide can cause global cooling, while volcanic carbon dioxide has the potential to promote ___.

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Understanding

How do sulfate aerosols affect the Earth's climate?

• They increase the reflection of radiation from the Sun back into space, cooling the Earth's lower atmosphere.

• They trap heat in the Earth's atmosphere, causing warming.

• They have no significant impact on the Earth's climate.

• They only affect the ozone layer without impacting climate.

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Understanding

In 2010, how did human CO₂ emissions compare to volcanic CO₂ emissions?

• Human emissions were about 80 to 270 times larger than volcanic emissions.

• Volcanic emissions were about 80 to 270 times larger than human emissions.

• Human and volcanic emissions were roughly equal.

• Volcanic emissions were negligible compared to human emissions.

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Evaluating

The 1980 eruption of Mount St. Helens vented approximately ___ million tons of CO₂ into the atmosphere in only 9 hours.

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Remembering

What is the impact of volcanic eruptions on the ozone layer according to the passage?

• Sulfate aerosols can deplete the Earth's ozone layer.

• Volcanic eruptions have no impact on the ozone layer.

• Volcanic eruptions increase the ozone layer.

• Volcanic eruptions only affect the ozone layer temporarily.

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Understanding