Ocean dumping explores carbon capture, faces ecological concerns

Many companies and researchers are exploring the idea of using the ocean to help reduce carbon dioxide in the atmosphere. This method involves sinking materials like minerals, nutrients, and seaweed into the ocean, where they could potentially store carbon for long periods. One such company, Planetary Technologies, is operating near a gas-fired power plant in Canada. They are releasing a mixture of water and magnesium oxide into the ocean, which they believe can absorb more carbon dioxide. Planetary's motto is "Restore the climate. Heal the ocean." The company has gained significant financial backing, including $1 million from Elon Musk’s foundation and is competing for a larger prize of $50 million. This ocean-based carbon capture industry has seen almost 50 field trials in the past four years, with startups attracting hundreds of millions in funding. However, there are concerns about the risks these projects pose to marine ecosystems and whether they provide real benefits in the fight against climate change. Critics argue that the industry is moving too hastily without proper regulation. Firms like Planetary sell carbon credits, which allow companies to offset their emissions by purchasing credits representing carbon removal. The market for marine carbon credits grew significantly last year, although it still represents a small fraction of the carbon reduction needed globally. Different approaches are being tested, including growing seaweed and sinking organic materials to seafloors. Some scientists are optimistic about these methods, while others stress the necessity for caution, as ocean ecosystems are delicate. Community responses vary. Some coastal residents express skepticism or outright opposition to projects being conducted near them, worried about potential environmental impacts. In North Carolina, a project using olivine was downsized due to concerns from local agencies about its effects on the ecosystem. As these projects advance, they face multiple hurdles, including monitoring their impact and providing assurance to local communities about safety. The scientific community remains divided on the effectiveness and potential risks of these ocean-based solutions. Experts acknowledge there is a pressing need to act against climate change, with emissions still rising. While these ocean carbon capture technologies might contribute to solutions, scaling up significantly will require substantial resources and careful management to minimize risks to marine life and ecosystems.