OpenCarbon
Agricultural Waste Biochar — Example Project
Agricultural Waste Biochar — Example Project
Core Score
StrongOur highest-confidence project. Biochar locks carbon into a stable solid that resists decomposition for centuries, and Puro.earth's engineered-removal methodology leaves little room for dispute about whether the removal happened — which is also why it costs more per tonne than avoidance credits.
- Permanence How long the carbon stays locked away
- Strong
- Leakage risk Whether cutting emissions here just pushes them elsewhere
- Strong
- Verification quality How rigorously an independent auditor checked this
- Strong
- Co-benefits Extra good it does beyond carbon — jobs, health, biodiversity
- Moderate
Illustrative example — this is one of OpenCarbon's example placeholder projects, scored to show how the Core Score works.
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⚠ Example project — placeholder content, not a real project or purchasable credit. Replace before launch.
Converts agricultural residue into biochar — a charcoal-like material made by heating plant waste without oxygen — locking the carbon inside it for centuries instead of letting it decompose back into CO2, while also improving soil health.
| Registry | Puro.earth (Biochar methodology) |
| Developer | [PLACEHOLDER — "Example Developer Co."] |
| Country | [PLACEHOLDER — e.g. Netherlands / Germany] |
| Vintage | 2025 (the year this emission reduction happened) |
Permanence — why this costs more: This is a "removal" credit — it actually pulls carbon out of the air and locks it away for centuries, rather than just preventing future emissions like an "avoidance" credit (such as the cookstove project below) does. That's the main reason it's priced higher per tonne. See the Core Score above for our independent read on this project's overall quality.
From verified project to your certificate
A carbon credit isn't a promise — it's a tracked, one-time-use unit. Here's the mechanism behind every purchase.
Verified against real standards
Projects are audited under an established methodology (e.g. Gold Standard, Verra, Puro.earth) before any credit is issued.
Serial-numbered & registered
Each credit equals one tonne of CO2e and gets a unique serial number in a public registry — so it can't be sold twice.
You buy from OpenCarbon
We source credits from registered projects and transfer them into your name the moment you check out.
Retired — with your certificate
Your credit is permanently retired in the registry, and you get a certificate showing its serial number as proof.
Grounded in real standards, not marketing claims
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