|Guardian Liberty Voice
Sapwood from a tree branch can be used to filter over 99 percent of E.coli from drinking water, according to the latest findings by MIT mechanical engineers, and this low-cost method of water filtration may prove to be a boon to developing countries.
Sapwood, Naturally Occurring Low-Cost Water FilterNews Tonight Africa
MIT Researchers Find Sapwood Branch As Effective Water PurifierThe Almagest
Tree Branches Make Very Effective Improvised Water Filters, Research FindsPlanetSave.com
The Escapist –Design & Trend –The Epoch Times
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