Ocean-Based Carbon Removal Credits

What Are Ocean-Based Carbon Removal Credits?

Last reviewed by James Hartley on 02 April 2026

Ocean-Based Carbon Removal Credits represent a new approach in the fight against climate change, focusing on enhancing the ocean's natural capacity to absorb CO2. These projects include methods like ocean alkalinity enhancement, seaweed farming, and artificial upwelling, designed to accelerate the ocean's ability to capture and store atmospheric carbon dioxide.

Projects such as these aim to support natural processes that remove carbon from the atmosphere by increasing the ocean's uptake of CO2. For instance, adding minerals to seawater can increase its alkalinity, making it better able to absorb more CO2-similar to how plants take up CO2 through photosynthesis but on a marine scale.

According to the UNEP, A single tonne of circuit boards contains 40-800 times more gold than a tonne of ore.

How Do Ocean-Based Carbon Removal Credits Projects Work?

Ocean-Based Carbon Removal Credits projects work by enhancing the ocean's ability to act as a carbon sink. Techniques like adding minerals to seawater increase its alkalinity. Which in turn enhances its capacity to absorb CO2 from the atmosphere. Seaweed farming also plays a role by cultivating fast-growing marine plants that capture CO2 through photosynthesis and can be harvested for biofuel or other products.

Each project varies in scope and effectiveness. For example, one hectare of seaweed farm might remove around 50 tonnes of CO2 annually, while ocean alkalinity enhancement could store hundreds to thousands of tonnes per year depending on the scale and method used. The science behind these projects is still evolving, but initial studies suggest significant potential for large-scale carbon removal.

According to the UN Global E-Waste Monitor 2024, The world generated 62 million tonnes of e-waste in 2022, up 82% from 2010.

How Much Do Ocean-Based Carbon Removal Credits Cost?

Ocean-Based Carbon Removal Credits currently cost between $100 and $500 per tonne of CO2 equivalent (CO2e), depending on the project's specifics and market demand. The price range reflects varying levels of implementation costs, verification requirements, and the maturity of different technologies.

How Are Ocean-Based Carbon Removal Credits Verified?

Verification for Ocean-Based Carbon Removal Credits is still in its early stages but includes emerging methodologies developed by organizations like Puro.earth and Verra. These frameworks aim to ensure that projects meet stringent environmental standards and accurately measure carbon removal over time. Verification processes include regular monitoring, data collection, and independent audits to confirm the permanence of carbon storage.

How Ocean-Based Carbon Removal Credits Connect to Recycling

Ocean-based carbon credits are closely tied to recycling efforts because ocean plastic and e-waste pollution can disrupt marine ecosystems that act as natural CO2 sinks. When electronics end up in waterways, they not only harm wildlife but also reduce the ocean's ability to absorb CO2 naturally. By preventing electronic waste from entering oceans, we protect these vital carbon storage systems.

According to the European Parliament, less than 1% of rare earth elements in e-waste are currently recycled.

Should You Buy Ocean-Based Carbon Removal Credits?

Buying Ocean-Based Carbon Removal Credits makes sense for businesses and individuals looking to offset their carbon footprint in a way that supports innovative climate solutions. However, it's important to thoroughly research projects and verify their effectiveness and permanence through recognized standards like those being developed by Puro.earth and Verra.

Ecycling Central encourages everyone to consider both buying credits and responsibly recycling electronics to minimize e-waste pollution and support sustainable carbon removal initiatives.

Sources

• UNEP
• UN Global E-Waste Monitor 2024
• European Parliament