Water Quality : Taking Responsibility by Susan L.
Conner (Illustrator), Susan L. Connor, Lloyd A. Freeman.
The "hydrologic cycle" is an endless loop of water
recycling itself: surface water evaporates forming clouds; the
clouds produce rain, which percolates into the earth's surface
to become groundwater or creates lakes and streams; the
underground water and streams flow into the sea; this water
again evaporates into the air. The same water is used and reused
millions and millions of times. We must realize that we, too,
are reusing water. It is important to understand that water from
an underground source or a sparkling spring may have been used
before and isn't necessarily as clean as it appears. It's time
we stop taking our drinking water for granted. It's time to take
responsibility for keeping our own water clean.
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