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How much water is there on earth?

Posted by Diego Fonstad
Diego Fonstad
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on Tuesday, 19 June 2012
in Images that speak for themselves

water on earthTeachable Moment: This stunning image from the USGS illustrates shows both the relative scarcity of water on our planet and challenges our thinking of volume.  We all know that the earth is almost 97% covered with water, but how many of us realized how thin a layer that represented and what that was relative to the land mass?  Follow the link to a larger image and the underyling math.

Reference: http://ga.water.usgs.gov/edu/2010/gallery/global-water-volume.html

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