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Need a water filter? Peel a tree branchBoston MA (SPX) Mar 04, 2014 If you've run out of drinking water during a lakeside camping trip, there's a simple solution: Break off a branch from the nearest pine tree, peel away the bark, and slowly pour lake water through the stick. The improvised filter should trap any bacteria, producing fresh, uncontaminated water. In fact, an MIT team has discovered that this low-tech filtration system can produce up to four liters of drinking water a day - enough to quench the thirst of a typical person. In a paper published th ... read more |
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