It is difficult to think of international trade without ships as the main means of transporting supplies, whether raw materials or food. Transport vessels handle around 77% of the European Union's foreign trade and 35% of intra-community trade, according to figures collected by the European environment agency. Unfortunately the volume of pollution they cause is approximately 13.5% of all greenhouse gas emissions generated by the transport sector in the European Union. There are already movements to reduce that emissions, there are those who decide to bet on electric ships and those who seek new options to take advantage of the great ally of marine traffic: The wind, either going back to the old sailboats or with new technology to help make the most of its momentum. A few days ago the port of Newcastle, in Australia, received on its inaugural trip to the ShoFu Maru, the first branque ship of the world that works in part thanks to the boost of wind energy. The ship, with a record of...