The Port of Leith in Edinburgh, Scotland, has launched a groundbreaking initiative by introducing a green hydrogen shore demonstrator aimed at supplying clean energy to vessels while at the port. This project, supported by the UK Government and funded by the Department for Transport, is a significant step towards reducing carbon emissions in the maritime industry. By integrating water treatment, waste heat utilization, and hydrogen production, large tugboats operated by Targe Towing will now utilize green hydrogen for shore power, eliminating the need for diesel auxiliary engines during their time at the port. The process involves water treatment technology by Waterhelm and electrolysis systems by Logan Energy to produce green hydrogen from water sourced from a nearby wastewater treatment plant. The collaboration of companies like Forth Ports, Targe Towing, Logan Energy, PlusZero, and Waterhelm has made this project feasible, with the demonstration showcasing the successful implementation of this innovative approach to sustainable energy in the maritime sector. The initiative not only focuses on reducing carbon emissions but also highlights the importance of future-proofing water supply for hydrogen production in the face of challenges like declining water availability due to climate change and population growth. Cabinet Secretary for Transport Fiona Hyslop praised the project as a 'world first for Scotland,' emphasizing the role of green hydrogen in mitigating carbon emissions in the shipping industry. Ali Abbassi Monjezi, Director at Waterhelm, underlined the synergistic benefits of linking wastewater treatment sites with hydrogen production plants, illustrating the potential of such interconnected systems for sustainable energy production. Overall, the introduction of the green hydrogen shore demonstrator at the Port of Leith represents a significant advancement in utilizing clean energy sources and fostering innovation in the maritime sector.