sjostrom7 Karma 36 Created 4 years ago Recent Submissions 1. ▲ Polyformer: An open-source machine, recycling bottles into 3D printing filament (dezeen.com) 7 points · 3 years ago · 1 comment 2. ▲ Hemp rebar could offer low-cost non-corroding alternative to steel (dezeen.com) 2 points · 3 years ago · 0 comments All submissions on HN · View profile on HN