Ports play an essential role in the movement of goods and passengers around the globe as a link between sea and land and are vital to the economy of the cities and regions within which they are located. In the coming years ports will also need to contribute to decarbonization in order to help achieve the climate targets. At the same time competition between ports has dramatically increased in recent years. Hamburg is a pioneer in the area of sustainability in the port with actively pursuing the goal of reducing emissions of ships while at berth. The lecture will highlight the opportunities and challenges of increasing the port’s sustainability while maintaining its competitiveness and efficiency. Topics such as onshore power supply (OPS), the need for a level-playing-field and the potentials of digitalization will be presented.