Water Filtration
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Description
SEE HOW WATER FILTERS THROUGH THE LAND, DANGER OF FLOODING AND STATEGIES FOR AVOIDANCE
Resources
2litre bottles per child, stones, sand (not builders sand - must be washed/clean sand), cotton wool
Instructions
See this other posting which has far better resources and information.
http://osmgr.in/a/3731
Tags
- outdoors
- water
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