Scientists Find Natural Water Filter in Tree Branches - Presented by: The Aol. On Network

Researchers from the Massachusetts Institute of Technology have discovered a natural water filtration system inside the branches of a sapwood white pine tree. After stripping the bark from a branch, they found that it was capable of filtering up to 4 liters of river or lake water a day, cleaning 99 percent of E. coli bacteria and producing clean, potable water.



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