Tree bark filters 99% of e-coli from water

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It turns out certain kinds of bark, when peeled, rival cilantro’s ability to scrub contaminated water clean of harmful bacteria. In an experiment, they found sapwood is capable of eliminating 99 percent of E.coli bacteria. The same properties that allow xylem tissue to transport sap from a tree’s roots to its crown traps bacteria and other particles over 20 nanometers in size.

Makes sense!

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