French researchers from Grenoble Alpes University have evaluated the environmental impact of 3D printing with a case study focused on the production of orthotic insoles. To understand the environmental impact of the two processes, the researchers undertook a life cycle assessment (LCA). Relating to materials, the team report the "impacts from 3D printed insole are 65% less than a classic one
in the four impact categories." The four impact categories are Human Health, Ecosystem Quality, Climate Change and Resources.