Puro.earth, a platform for carbon removal certification, has launched a public consultation on its new Ocean Storage of Biomass (OSB) methodology. This approach focuses on long-term CO2 removal by depositing sustainable biomass into oxygen-depleted marine environments, offering a promising solution for atmospheric carbon reduction.
The public consultation period for the OSB methodology runs from 15 January to 5 February 2025. The methodology is part of Puro.earth’s commitment to durable carbon storage, aligning with global sustainability goals and enhancing transparency through its public Puro Registry, where CO2 Removal Certificates (CORCs) are issued and retired for each tonne of CO2 removed.
The OSB methodology leverages natural anoxic marine basins—areas with permanently oxygen-depleted conditions—to store lignin-rich biomass, which resists decomposition in low-oxygen environments. This process enables CO2 to be securely sequestered for over 1,000 years.
Under this methodology, only lignin-rich terrestrial biomass is used to ensure durability and minimal ecological disruption. The locations are chosen based on rigorous ecological assessments, advanced oceanographic modelling, and robust monitoring to ensure effective carbon storage. Additionally, the process is designed to replicate natural deep-sea carbon conservation mechanisms, contributing to long-term environmental benefits.
The OSB methodology aligns with several United Nations Sustainable Development Goals (SDGs), including SDG 14.c, SDG 11.6, and SDG 9.4.
To minimise risks, the OSB methodology incorporates strict environmental and social safeguards, including biomass Limitations, site-specific criteria and stakeholder engagement. These measures aim to avoid, minimise, or mitigate negative environmental and social impacts while enabling durable carbon storage.
