What is Puro.earth?
Puro.earth is a leading standard dedicated to durable, engineered carbon removal — methods like biochar, bio-based construction materials, and enhanced rock weathering that lock CO₂ away for centuries or longer. Unlike avoidance credits, removal credits physically take carbon out of the atmosphere. Their long-lasting storage is what credible net-zero claims increasingly require, which is why Puro.earth's credits (CORCs) command a premium.
As net-zero targets get more serious, the question shifts from “did you stop emitting?” to “did you actually take carbon back out of the air, and will it stay out?” That’s the question Puro.earth is built to answer.
A standard for removal, not avoidance
Most carbon credits are avoidance credits — they prevent emissions that would otherwise have happened. Puro.earth is different: it certifies carbon removal, where CO₂ is physically taken out of the atmosphere and stored. And it focuses on durable removal, where storage is measured in centuries or longer rather than the decades typical of forestry.
Its credit is the CORC — CO₂ Removal Certificate — with one CORC equal to one tonne of CO₂ durably removed and independently verified, serialised on the Puro.earth registry.
The methods it certifies
Puro.earth’s methodologies cover engineered and hybrid approaches, including:
- Biochar — biomass converted to a stable, carbon-rich solid that locks carbon away when applied to soils.
- Bio-based construction materials — storing biogenic carbon in long-lived building products.
- Enhanced rock weathering — accelerating a natural process that binds CO₂ into minerals.
What these share is permanence: the carbon is meant to stay stored far longer than a tree that could burn or be cleared.
Why removal costs more
Durable removal is harder, newer, and produced at smaller scale than avoidance — and that long-lasting storage carries a real cost. So removal credits trade at a significant premium, often many times the price of a forestry or cookstove credit. That premium reflects exactly what makes them valuable for serious climate claims.
Where it fits in a credible strategy
The strongest approach is a ladder: reduce your emissions first, use high-integrity avoidance credits for near-term action, and use durable removals for the residual emissions you can’t eliminate and for genuine net-zero or “carbon-removed” claims.
Our engineered-removal methodology sources Puro.earth-certified CORCs. When you choose it, you’re funding the hardest, most durable end of climate action — and as always, we retire the credit on the public registry and hand you a verifiable certificate.
What is Puro.earth?
Puro.earth is a carbon-crediting standard and marketplace focused specifically on engineered, durable carbon dioxide removal. It certifies methods such as biochar, bio-based construction materials, and enhanced weathering, and issues credits called CORCs once removals are independently verified.
What is a CORC?
A CORC, or CO₂ Removal Certificate, is the credit Puro.earth issues. Each CORC represents one tonne of CO₂ that has been physically removed from the atmosphere and stored durably. CORCs are serialised and tracked on the Puro.earth registry.
How is carbon removal different from carbon avoidance?
Avoidance (or reduction) credits prevent emissions that would otherwise occur. Removal credits take CO₂ that is already in the atmosphere and store it. Removal is the only way to address historical emissions and hard-to-abate residual emissions, which is why it's central to net-zero.
Why are removal credits more expensive?
Durable removal is technically harder and currently produced at smaller scale than avoidance, and its long-lasting storage carries a higher real-world cost. Engineered removals such as those certified by Puro.earth therefore trade at a significant premium — often many times the price of avoidance credits.
When should I choose removal credits?
Choose durable removals when you need the highest-integrity option — for strict net-zero or "carbon-removed" claims, or when you specifically want to fund pulling CO₂ back out of the air rather than preventing future emissions.
