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MIT Engineers Make Low-Cost Filters From Tree Branches to Cleanse Drinking...

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Xylem tissue in gymnosperm sapwood can be used for water filtration (as seen on top). Xylem is comprised of conduits that are interconnected by membranes that filter out contaminants present in water (bottom). Credit: Courtesy: N.R. Fuller, Sayo Studio Prototypes tested in India show promise as a low-cost, natural filtration option. The interiors of nonflowering…