Researchers are exploring innovative methods to enhance the ocean's natural ability to absorb carbon dioxide, potentially revolutionising climate change mitigation. Companies including Captura and Equatic are developing technologies that extract CO2 from seawater, making the ocean a more effective carbon sink. The processes, which leverage phase-change materials and electrochemical reactions, aim to reduce the costs and environmental impact associated with traditional carbon capture methods. While the approach shows promise, further research is required to understand the potential ecological consequences and the massive infrastructure required to achieve significant global impact. (National Geographic)