It all started with the Rostlaube, a pilot project for an integrated fish and vegetable farm, by UrbanFarmers AG, Switzerland. The concept: plants need fertilizer and fish need clean water. In the natural environment, these species work together in a healthy mutual support system. Rostlaube delivered proof of concept: that natural cycle can be reduced to a minimum and replicated in a self-contained unit that could be relocated to where the source of food is needed.

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