Closing the Loop on 3D Printing
…prototyping of solid models. 2 Feb. 1999. Greene, Sean. “Plastic trash could top 13 billion tons by 2050. And recycling doesn’t help much.” Los Angeles Times, 21 July 2017, www.latimes.com/science/sciencenow/la-sci-sn-plastic-trash-20170721-htmlstory.html….