Share this page Project Circular Supply Chain for the City Circularity in Urban Regions Something unexpected is growing in the waters of Amsterdam: seaweed! What are these plants doing amidst the bustle of the city? They will provide the biomass for manufacturing new local goods using 3D-printing techniques. Project Circular Supply Chain for the City Circularity in Urban Regions Something unexpected is growing in the waters of Amsterdam: seaweed! What are these plants doing amidst the bustle of the city? They will provide the biomass for manufacturing new local goods using 3D-printing techniques. Project Circular Supply Chain for the City Circularity in Urban Regions Something unexpected is growing in the waters of Amsterdam: seaweed! What are these plants doing amidst the bustle of the city? They will provide the biomass for manufacturing new local goods using 3D-printing techniques.