Making carbon removal units convenient, and making sustainability a no-brainer.Get involved
Focus on removal
We provide carbon removal units (or CRUs). By focusing on CRUs rather than other available carbon credits (prevention or reduction), we ensure our credits are of the highest quality, reliability, and transparency. Of course, carbon prevention and reduction are vital as well. That's why we require evidence from corporate buyers that they are actively lowering their carbon emissions before we'll sell them CRUs.
No empty promises
We don't sell credits that aren't real yet. Every credit you purchase represents actual biomass. Not future biomass, not the promise of biomass. It's not a guarantee: it's a statement of fact. At the end of the day, our heritage is down-to-earth and clogs-in-the-clay. Our carbon registry details every carbon removal unit we've ever issued: where it comes from, whether it's still around (or retired), the whole yarn. All thanks to technological advances.
Read all about how we use remote sensing tech to capture carbon here.
How we help farmers
All the same, carbon removal allows us to empower smallholder farmers in developing countries. This group generally contributes little to climate change but is all the more impacted by it. That's why we focus on active carbon offsetting through carbon sequestration via increased biomass and agroforestry: two birds, one stone.
See it for yourself
We meticulously document where our CRUs come from and where they're going. Our tools enable us to verify that the biomass they represent is still present. And that data is available to all: everyone can check the details of individual CRUs, farmers, and plots of land. Transparency is a two-way street, after all.
Have a look yourself, or view all plots of the project here.
Visit Rosa's farm
Ease of mind
Doing the right thing should be easy. So our process for issuing carbon removal units is streamlined for your convenience. All you have to do is decide to champion sustainability. We'll happily facilitate the rest. And you don’t just have to trust our word, for it: we’re certified by Plan Vivo, so you know you’re in capable hands.
More information about our CRUs
We believe in our mission and commit ourselves to empowering smallholder farmers and fighting climate change. That also means that we want the organizations who buy our credits to make a real effort, and not just buy a few carbon credits and tick a box. At least one of the following measures should be in place to be eligible to purchase Acorn CRUs:
A committed science-based target (SBTi) aligned to limiting a global temperature increase to 1.5 degrees;
A written strategy in place to reduce your greenhouse gas emissions (publicly available or available to Rabobank);
Proven greenhouse gas reduction (publicly available or available to Rabobank).
Rabobank/Acorn reserves the right to refrain from or discontinue contracting with individual organizations that do not (continue to) meet sustainability requirements.
Furthermore, all buyers need to comply with the Rabobank Sustainability Statement. For organizations without a current relationship with Rabobank, a customer due diligence check, in accordance with Rabobank’s due diligence standards will be part of any purchase process.
Each and every Acorn CRU you buy:
Represents one tonne of CO2;
Is certified by Plan Vivo;
Denotes removal offsets (not avoidance, reduction or allowance credits);
Is ex-post—the carbon is sequestered before the CRU is generated, not a promise for the future;
Provides a nature-based solution—we use agroforestry methods rather than technological solutions like direct air capture;
Is derived from projects that exclusively cover smallholder farmers (<10 ha) in developing countries;
Is transparent, measured with remote sensing and traceable —we show when, where and by whom the carbon is sequestered, all the way down to the individual plot and farmer level;
Features a durability period of 20 years—this is the period during which the CO2 represented by a CRU is expected to remain removed from the atmosphere or sequestered in the buffer pool;
Is backed by a buffer pool put in place as insurance for reversal events;
Guarantees 80-90% of the sale price flows directly back to the smallholder farmer;
Contributes to UN Sustainable Development Goals 1, 2, 6, 8, 9, 13, 15, 17.
Has a minimum price of EUR 20;
As CRU prices fluctuate, we can only provide an indication of our recent transaction price of €31 (updated 1-12-2022). No rights can be derived from this information.
Every Acorn CRU represents one metric tonne CO2, which is intended to be:
Net of any leakage,
Removed from the atmosphere as a result of the biomass growth in agroforestry projects,
Additional to any GHG reduction that would occur in the base of the projects
Stored or otherwise sequestered during the durability period.
The durability period is the period during which the CO2 represented by a CRU is expected to remain removed from the atmosphere or sequestered in the buffer pool. For our CRUs this currently is monitored for 20 years since its creation.
To support durability, we have created a buffer pool by setting aside 15% of the CRUs issued. In case of unexpected, premature release of carbon stock (e.g. through forest fires or illegal logging), CRUs are replaced from the buffer pool (which is not unlimited). These replacement CRUs are referred to as buffer pool CRUs. The buffer pool is managed by Rabobank with third-party oversight from the Plan Vivo Foundation. For avoidance of doubt, Acorn’s reversal obligation is capped to the CRUs available in the buffer pool.
CRUs are calculated following the Acorn methodology. CRUs are based on the values of above ground biomass in a certain plot, derived from satellite images and ground truth data using predictive machine learning models.
To generate CRUs we use machine learning carbon models to measure the above ground biomass. The carbon models are developed from a combination of sample plot ground truth measurements and satellite imagery for a specific ecoregion. The models make an estimate of the total biomass of a certain plot. Data from sample plots is used to calibrate the models. The minimum accuracy of the models is 70% and is compensated for with an uncertainty adjustment factor. All models are independently validated by EY and Rabobank.
For a full description of our process and all details of the models and formulas used, have a look at the Acorn framework and methodology. Both are publicly available on our website and both have been under public consultation.
The Acorn Framework describes our approach and the Plan Vivo certification process and requirements for every Acorn CRU.
The Acorn Methodology describes the processes involved when measuring and calculating carbon removal units. The Methodology has been externally assessed and approved by two accredited validation and verification bodies: SCS Global Services and AENOR.
Buyers have a committed science based target (SBTi) aligned to limiting a global temperature increase to 1.5 degrees and/or a written strategy in place to reduce its GHG emissions and/or a proven GHG reduction (publicly available or available to Rabobank) and purchases Acorn CRUs to compensate unavoidable GHG emissions from its activities.
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