Examining the existing legal framework for ocean carbon dioxide removal, this forward-thinking book explores whether, when, where, and how future research and deployment can take place in the field. It provides a detailed exploration of how the ocean could be used to remove and store carbon dioxide from the atmosphere, describing five commonly discussed ocean CDR techniques—rock-based ocean alkalinity enhancement (OAE), electrochemical OAE, ocean fertilization, artificial upwelling and downwelling, and seaweed cultivation—and exploring the legal issues that different techniques could raise.