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The water we drink and use was running short£®We all have to learn what to stop wasting water£®One of the steps that we should take are to find ways of reusing it£®Today in the most large cities, fresh water is used only once and then it runs in waste system£®But that is possible to pipe the used water to a purifying factory, there the used water can be treated with chemical materials by the workers so that it can reused£®But even if every large city purified and reused it¡¯s water, we still would have enough water£®