Wind power is one of the options being discussed. Maersk, the world’s largest container shipping line, has already discovered it can cut fuel use 30% simply by steaming more slowly. Because of the wide availability of cheap (and often dirty) fuel, shipping has traditionally been wasteful. Entirely new shipsPutting together better designs and better fuel will create entirely new kinds of ships in future. Solar power can only augment other power sources.
Source: The Guardian May 03, 2018 12:56 UTC