Student pouring river water into beaker held by teacher and service employee overseeing in background by Hillebrand Steve, U.S. Fish and Wildlife Service
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Ever thought about this? About 71% of the earth is covered in water. The amount of water on the earth is a constant. We never make more water, but we don't lose any water. That's the good news.
The "bad" news comes in the form of this question:
How usable is the water that covers the face of the earth?
The "bad" news comes in the form of this question:
How usable is the water that covers the face of the earth?
Look at this graph. Ever tried to drink water from the ocean? DON'T! Only 3% of the water on the earth's surface is fresh water, and, according to the US Geological Service, 68.7% of it is frozen! You get the idea. We have very little water that is actually usable. We need to take care of the water we have. |