… Marine geoengineering refers to targeted interventions in the seas to mitigate climate change, such as through methods for CO₂ removal. The legal basis for this is … 3 HSEG). last update on 18.11.2025 Background Responsibilities for the approval and monitoring of activities (enforcement) in relation to marine waters are divided … ( HSEG ) is to protect the marine environment by regulating the dumping of waste and other matter in the high seas since 1998. The international basis for this …