3D printing must minimize both the plastic not reused today, AND the one produced tomorrow.
At least three, that is. Not equally realistic, or fair.
Last summer, professor J. Pearce argued that “Trade wars will boost digital manufacturing - at consumers’ own homes with personal 3D printers”. I hope that that 3D printing-enhanced boost happens, but I also believe, and hope, that it will not happen where prof. Pearce says.