Everybody knows that there is serious problem of water pollution on the earth。 Yes， water pollution is increasing。

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Look! The water in the river is getting dirtier and dirtier。 Most of fish in the water have died， and we can’t swim in the water。

My grandfather says， when he was very little， the water in the river was very clean。 He often swam in the river with his friends。

That was before， but now we can’t see such clean rivers。 Let’s protect the water from pollution， because we can’t live without water。 The water is really important to us all。