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SCIENCE

There are 6 quintillion gallons of water hiding in the Earth’s crust

A new study looks at how much water is stored beneath the Earth’s crust.

Most of us think of the water cycle as something that occurs above ground: water falls from the sky, evaporates back into the atmosphere and then condenses into rain or snow once again.

But the water that’s above ground is just a fraction of our planet’s total water story.

Hidden in the Earth’s crust are vast stores of “groundwater,” water that fell from the sky and then trickled into the cracks and crevices between the sand, gravel and rocks beneath our feet. This resource makes up 95% of the freshwater that is not tied up in glaciers or ice caps.

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Also:

How much water is there on, in, and above the Earth?

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