3-D Printing in Action (IMAGE) Michigan Technological University Caption Materials science graduate John Laureto prints a gear on a Rep Rap 3-D printer in Joshua Pearce's lab at Michigan Tech. A study by Pearce demonstrates that printing such items is greener because it uses less energy. Credit Sarah Bird/Michigan Technological University Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.