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Environmental Science

The Hydrological Cycle and Its Global Water Distribution

Quick fact

Almost 97% of Earth's water is salty ocean water, and of the remaining 3% freshwater, over two-thirds is locked in glaciers and ice caps. That leaves less than 1% of the planet's water as liquid freshwater in rivers, lakes, and aquifers—making it a remarkably rare resource.

Why this is interesting

You've seen rain, rivers, and oceans—but did you know that the water you drank today may have once been part of a glacier or a dinosaur's bath? Where does all this water actually go, and how much is truly available for us to use?