91.  First, we must save fresh water in both our daily living and our industry.

92.  Secondly, we have to take all measures to protect them from being polluted and try our best to make use of the polluted water lastly , we May fall on the chemical techonoly that will make us get more fresh water from oceans.

93.  For a long time, people have taken it for granted that fresh water in the world is plenty enough not to be used up.

94.  In many countries, even the fresh water used to eat can't be ensured , which has caused a lot of trouble in people's everyday life, why ?

95.  Nowadays many people take it for granted that our fresh water is limitless.

96.  But in fact, our earth is heading for a crisis -- there is global shortage of fresh water.

97.  All these factors result in the shortage of fresh water.

98.  Many people think that fresh water is unlimitted .

99.  All these can provide us with fresh water.

100.  But, it is actual that fresh water is in shortage.