love nature is to love our mankind. As the new generation who enter the new century, we should make efforts to love and respect nature, to treat it well and protect it. At last, we have the night to enjoy it.
?My dear Teachers，fellow students and friends： Good afternoon．
?As we all know, the earth is a planet almost covered by water，and it is water made every thing on the earth lively．Water is also one of the important part of our environment．Though，is there really so much water for us to clean，to produce many things，to play with? how much water are there on the earth then?
?Most of the water is in the oceans or locked away as ice．The largest volumes of fresh water are stored underground as groundwater，imagine there is only one barrel of water in the world，then there is only a spoon of it on the land，and the water we can use is only a drop of it．Now I have to remind all of you here that the single drop of water is never as Clean as before，it has been polluted severely by
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