As ports are critical nodes in global energy flows, understanding their evolving functions in supporting renewable energy carriers is essential. This book provides a comprehensive analysis of the role of European ports in the energy transition, focusing specifically on the import, storage, and infrastructure challenges related to green hydrogen and ammonia. The authors address the pressing need for strategic guidance on how ports can adapt to and facilitate the shift from fossil fuels to low-carbon energy sources. They offer a scenario-based approach to infrastructure allocation, investment requirements, and strategic positioning of key European ports under future decarbonization pathways. By providing detailed analyses, cost and surface area calculations, and scenario projections, this book equips readers with the tools to optimize port planning for the integration of green hydrogen and ammonia, thus enabling a more sustainable and resilient energy supply chain in Europe. This volume will be of particular relevance to researchers and graduate students in the fields of port economics, energy logistics, and sustainable transport systems. The actionable insights presented will also appeal to policymakers and industry stakeholders.