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Water - General Information.
Water is essential for all life. Nothing can live without water.
On the surface of the
Earth there is more water
than
any other substance.
Water moves
between the surface of the Earth
and the atmosphere
(see the Water
Cycle).
Water has
many uses.
It is treated
on a large scale to make it safe to drink.
Water is used both as a solvent and as a coolant.
Water is an
important raw material for
many industrial processes
including the manufacture of ammonia and sulfuric
acid.
Many substances dissolve in water. Some of
these substances
make water hard. Some substances
react with
water to produce acidic or alkaline solutions.
The sea contains a very large number of dissolved substances.
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