Once again, researchers are taking a look at levels of toxicity that may be present during the process of 3D printing. Looking at concerns regarding ultra-fine particles and chemical emissions, it was discovered that if you are just printing moderately there should be no reason to worry. While good ventilation is common sense, researchers found that unless someone is sitting by the 3D printer for an extended amount of time, they should not in any danger, although fumes from ABS were found to be more harmful than that of PLA—which seems to pose no hazard whatsoever. Read more at 3DPrint.com: http://3dprint.com/117782/3d-printin...h-researchers/