It was a small vessel that gave up the square sail and replaced it with a mast and a piece of cloth that allowed catching the wind sideways and sailing straight. And the first submersible – that had a tendency to be a little too submerged, more similar to a non “emergible boat”– had a pedal-powered propeller.  So, now this is the story I am telling you. There are plenty of boats at sea with carbon or fibreglass hulls. These are wasteful materials because the residues generated in the shipyard have to be thrown away and when boats come to the end of their life cycle, they too have to be discarded. We are going to talk about technologies connected with the circular economy. This is it, so it suddenly becomes very important. Their mission is to build highly sustainable h...