Earth

From where does 90% of the water vapor in the air come?

More Questions from Earth
What event can cause much damage from the shaking of the Earth's crust?
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What is a sudden and heavy rainfall or downpour called?
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What is the only continent on Earth that does not have snakes?
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In Wyndham, Australia, it was 90 degrees for how long?
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What is the solid form of water?
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What is the boundary between two air masses called?
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Which of these habitats describes the North Pole?
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Earthquakes sometimes cause "tidal" what?
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