Using nature’s own water purifiers

Five years ago, Fish Fry Lake was dying. The solution was as simple as it was improbable: cover rafts with plants, and set them afloat in the lake. Today, the lake is home to a thriving community of fish. Water clarity improved and oxygen levels rose. Read more… http://www.bbc.com/future/story/20120925-natures-water-purifiers

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