For centuries, ships used wind-catching sails to travel all over the world. Then the steam engine arrived during the industrial age and changed maritime transportation forever. Of course, the massive engines in today’s vessels rely on petroleum for power, presenting a number of potential problems. Along with environmental issues, big tankers also cost a fortune to fuel. For instance, the Danish shipping firm Maersk Group spends $2.1 billion per year on fuel costs.

To reduce this enormous expense, the company Continue reading →