Contact: Marcia Goodrich
Michigan Technological University
Caption: One way 3-D printing saves energy over manufacturing is by using less raw material. This series of partially printed Swiss children's blocks illustrates how a 3-D printer can partially fill the interior of an item with plastic while maintaining its structural strength.
Credit: Samuel Bernier/Thingiverse.com
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Related news release: 3-D printing: The greener choice