Unusual water recycling device is revealed

British scientists have developed a rooftop vegetation recycling system that allows water to be used twice before being discarded.

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<p><a href="http://www.physorg.com/news8875.html">Unusual water recycling device is revealed</a></p> <p>British scientists have developed a rooftop vegetation recycling system that allows water to be used twice before being discarded. </p>