Last we checked, plastic isn’t metal, and so 3d printing a turbine to give the extremely hot exhaust something turn just isn’t going to work. But what if you just skipped the whole turbine ...

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The WinDIY design is mostly 3D printed, with a familiar three-bladed design. The diameter of the rotor is 1.2 m, meaning that braking and regulating the turbine is required for safety in high winds.

Clean, renewable energy often comes at a price. Enter "turbine trees" - one company's way of tackling the issue of aesthetics in sustainability. Designer NewWind R&D has created a "silent ...