Simple And Free Bio Sand Water Filter From A 2-Liter Bottle
Want a way to filter water to near tap-quality for free? Without spending a dime, you can construct a very effective bio-sand water filter from a recycled 2-liter bottle that removes over of contaminants. Followed up by solar water disinfection (SODIS), you can easily produce safe drinking water with no cost whatsoever. ...
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Posted by Mobile Rik