VALPARAISO — Tubes filled with multicolored plastic pellets fill the shelf in Adam Johnson's kitchen. A large motor is perched on a table by the back door and, across from it, sits a peculiar metal ...
A new era of 3D printing "microfactories" is helping to turn waste plastics into "highly competitive" products fit for use in the construction industry, according to Veena Sahajwalla, professor and ...
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