With the initial initiative and the international support of ISCO experts, the local organization of the ISCO Corporate Member OceanPact (https://oceanpact.com/en/home/) this Case Study Seminar will be held on October 27, 2023 in Rio de Janeiro Brazil. The Program includes three recent specific important cases from this third decade of the 21st century and which are considered to have been paradigmatic due to their causes and consequences, not only in terms of environmental impacts, but also in legal, technical and economic aspects.