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SODIS: FREE Modern Water Purification System
Want to know how to purify water for emergency purposes and survival? Water purification is a very handy skill to have in your back pocket....
Want to know how to purify water for emergency purposes and survival? Water purification is a very handy skill to have in your back pocket....
Stuck in the wilderness with nary a drop of water in your canteen? Don’t worry. You can survive this situation and live to tell an...