Building a solar still is an important craft to know. Stranded on a beach, in a desert, or lost in the wilderness on a day hike gone bad? This can save your life.
Rule of 3's: The average human body can go 3 minutes without air, 3 days without water and 3 weeks without food.
Knowing how to create drinkable water from a stagnant source or from vegetation can save your life!
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