Full carbon accountability

Oncra stands for Open Natural Carbon Removal Accounting. We are developing this as an open accounting standard and transaction rulebook for natural climate solutions, because it is a systemic missing link. We develop full carbon accounting starting from all Global Goals for Sustainable Development (SDGs) and follow the principles of doughnut economics. Entrepreneurs, innovators, investors, philantropists, economists, bankers, accountants, hackers and others are invited to join the emerging ecosystem at oncra.org. We’ve written in more detail about Oncra on Medium.

Image by Andy Dockett

Enabling business

We aim to develop a doughnut based natural carbon accounting framework in close collaboration with all entrepreneurs in climate solutions who need it to close their business case. It will enable them to effectively calculate and verify how much carbon they sequester (remove from the atmosphere). This makes it much easier to monetize their carbon removal whether through voluntary carbon markets or taxation / government revenue streams.

Schematic of carbon accounting frameworks; for carbon removal with natural methods, there is lack of estimation models and (cost)effective verification systems.


The problem with current accounting mechanisms is their complexity which is incompatible with the scale and quality of natural climate solutions. Typically a project has to go through an expensive advisory process before a verification organisation like Verra or Gold Standard will list it. For many nature based projects, that collectively can reach distributed scaling, this process is inaccessible both through lack of finance and capacity.

The current approach is focused on making very precise and heavily verified measurements instead of ‘ballpark’ order-of-magnitude estimates that fit much better with inherent uncertain growth processes in natural ecosystems. We aim to develop such lightweight methodology and deliver the necessary trust by smartly designing distributed verification mechanisms.


Doughnut Economics

Doughnut economics, Kate Raworth’s ideas for an economy that serves human needs within planetary boundaries, is central in our thinking. We create the world’s first dougnut-based natural carbon removal accounting framework, as this will enable the businesscases of thousands and kick-start the new nature economy to beneft both humans and other life. We are a founding member of the Amsterdam Doughnut Coalition.








ASN Mobiel Bankieren - Apps en Google Play Home | Wij.land Holland Houtland Over greenSand | greenSand Logo provincie zuid holland - Humanity House

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True Nature Foundation - True Nature Foundation



Join The 1500 Club

With 1500 people we aim to remove the 1500 gigaton of extra CO2 in our atmosphere, using nature based solutions. This 1500 Club is by and for parents, entrepreneurs, investors, children, decision makers and anyone who wants to suck CO2 with us. Take part in our plan to draw 1500 gigaton CO2 out of the atmosphere this century and restore the global carbon balance.