This issue of Hydrolink includes a summary of the key points of the recent report of the Intergovernmental Panel on Climate Change (IPCC), whose conclusions make clear the urgency to expand the use of all forms of renewable energy, including offshore energy production, the theme of this issue. Four articles discuss different aspects of the design, operation, and use of offshore renewable energy structures. In addition, readers will find in this issue an article on the use of machine learning for early-stage piping design. This issue has been coordinated by Guilherme Moura Paredes.