| UPI.com BOSTON, Feb. 27 (UPI) — Dirty, contaminated water is a problem for many developing nations. But water filters are relatively expensive and not something easily assembled in the shed, garage or backyard — unless, of course, the water filter is already … A Simple Tree Branch Can Become a Backyard Water FilterPopular Mechanics Water Filter Made from a Tree Branch Removes 99% of E. coli BacteriaEcopreneurist Simple Wooden Water Filter Can Trap 99 Percent of E. Coli BacteriaNature World News Headlines & Global News –Laboratory Equipment –University Herald all 39 news articles |
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