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Carbon Removal

Ecosystem partners advising on and investing in ONCRA’s development

In order to combat global warming, the Paris Agreements, part of the UN Framework Convention on Climate Change (UNFCCC) have been in force since 2016. However, in order to achieve its goals, merely reducing emissions will not be enough. The Oxford Principles and other international initiatives advocate the use of carbon dioxide removal (CDR) to achieve the world’s climate goals

Climate Cleanup Foundation is an independent public benefit organisation with the goal to reverse climate change. With a bank and two Dutch regional governements, they pioneer carbon removal accounting. With systemic interventions they scale natural climate solutions, such as seaweed, bamboo, agroforestry and rock weathering. For more information about the foundation, visit

Oncra stands for Open Natural Carbon Removal Accounting. Oncra facilitates removal credits for nature-based solutions. Credits are issued based on measurements and open empirical crediting methodologies. Oncra exists to foster distributed scaling of natural carbon removal towards gigaton scale, by simplifying assessments, reducing the cost threshold and expanding the scope of removal pathways.

We remove carbon with Nature in four domains. Oncra certifies projects that store carbon in Constructions, Land, Oceans and Rocks. 

ONCRA Carbon Removal Credits are not just carbon credits. ONCRA performs a ‘doughnut check’ on the projects, evaluating co-benefits like biodiversity, clean water and meaningful jobs. ONCRA credits represent projects with ‘multi-potent’ benefits, ticking several Sustainable Development Goals (SDGs). Read more about Doughnut Economics.

Credits are issued for carbon removal based on measurements. ONCRA requires all procedures and measurements to follow ISO standards. These include ISO 14064-1 (on the quantification of greenhouse gas emissions and removals) and ISO 14064-2 (providing project level guidance) and ISO 14064-3 (on validation and verification), ISO 14040 and 14044 (on Life Cycle Assessment), ISO 10694 (dry combustion method) and ISO 14235 (sulfochromic oxidation method). All data is openly accessible.

We require buyers to adhere to the Oxford Offsetting Principles. The Oxford Offsetting Principles were established to reduce risks associated with existing offsetting schemes.

Read more about the Oxford Offsetting Principles.

Are you a carbon farmer, seaweed grower, enhanced weathering innovator or bio-based builder removing carbon via nature-based solutions? Then Oncra offers a bespoke open-source accounting framework for carbon removal, at no upfront cost. Oncra is independent, non-profit, is based on science, measured data and empirical crediting principles.

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