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Q&A When is improvised water filtration warranted for survival?

In the comments of the accepted answer to this longstanding question: Water filters - why sand and rocks? the makings of a debate started, but no definitive consensus was reached. I'm going to do m...

3 answers  ·  posted 6y ago by Arash Howaida‭  ·  last activity 6y ago by System‭

Question survival drinking-water