RE: RE: How sand and stones help in water purification especially in areas with oil contaminated waters
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RE: How sand and stones help in water purification especially in areas with oil contaminated waters

gentleshaid(75)
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Welcome to the community and this is such a nice post to start with. Did you make the sketch of the second image yourself or you snapped it from somewhere?

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@gentleshaid: Welcome to the | Ecency