One way to avoid getting sick while traveling is to only eat fruit that you peel yourself, since plants can filter out bacteria and prevent it from traveling throughout their tissues. Well, why not apply this principle to filtering water directly? A team of scientists have done just that, testing how well pine wood filtered water with its xylem, the tube-like tissue that transports water from plant roots to leaves. The results, published last week in the journal PLOS ONE, were very promising. "Filtration using three different xylem filters showed nearly complete rejection of the bacteria," catching at least 99.9% of them, the authors wrote.
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