How is the amount of water vapor in the atmosphere a positive feedback loop?

A. As the Earth's atmosphere warms, less water evaporates, causing there to be less water vapor in the atmosphere, which causes the Earth's temperature to decrease.

B. As the Earth's atmosphere warms, more water evaporates, causing there to be more water vapor in the atmosphere, which causes the Earth's temperature to decrease.

C. As the Earth's atmosphere warms, more water evaporates, causing there to be more water vapor in the atmosphere, which causes the Earth's temperature to rise more.

D. Water vapor in the atmosphere is not a positive feedback loop.

As the Earth's atmosphere warms, more water evaporates causing there to be more water vapor in the atmosphere which causes the Earth's temperature to rise more.

The amount of water vapor in the atmosphere acts as a positive feedback loop in the context of climate change. When the atmosphere warms, more water evaporates, leading to an increase in water vapor. Since water vapor is a greenhouse gas, its increased presence further enhances the absorption of infrared radiation emitted by the Earth, resulting in more warming.

This process, known as the water vapor feedback, amplifies warming effects beyond what would be expected from greenhouse gases alone, contributing significantly to the Earth's overall warming due to its ability to hold more water vapor as temperatures increase.

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