How Much Water is On Earth?

In this illustration, the blue ball represents the volume of all the water on earth, relative to the size of the earth. The tiny speck to the right of the blue ball represents Earth’s fresh water.

If Earth were the size of a basketball, all of its water would fit into a ping pong ball. If Earth were an apple, the entire water layer would be thinner than the fruit’s skin.

How much water is that? It’s roughly 326 million cubic miles (1.332 billion cubic kilometers), according to a recent study from the U.S. Geological Survey.

About 72% of Earth is covered in water, but 97% of that is salty ocean water and not suitable for drinkingIn fact, less than 1% of that 3% (the world’s freshwater) is readily accessible at the surface.

(via the-star-stuff :: photo by David Gallo/WHOI)

A new look at a commonly known fact. However, as that little speck of freshwater is largely locked in ice and that ice melts, climate change (whether natural or otherwise) is something we need to be preparing ourselves to handle. Especially those of us in low-lying states! And most major cities, for that matter.