Wind-Pressed Walnut Oil

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Food should be made the right way, with good ingredients. A simple oil press can be made; using only wind powered energy. The wind power is transformed into a worm drive that provides slow, but powerful movements. The machine is intended for nuts and seeds, and using no heat in the process produces fresh, pure cold-pressed oil and a nutritious pulp that is great for cooking, or using as animal feed.  

From Dave Hakkens