Why Puro.earth

Choosing a carbon removal partner is a matter of trust.

How is Puro.earth different from all the other carbon crediting programs?

Most carbon offset schemes focus primarily on emission reductions. Puro.earth focuses exclusively on carbon removal and pioneered several of the world's first crediting methodologies for engineered carbon removal.

We at Puro.earth ensure companies can neutralize carbon emissions with science-based carbon removals and remain trusted on the road to carbon net zero.

Our platform brings together suppliers of carbon-net-negative technologies and climate-conscious companies. We issue verified CO2 Removal Certificates (CORCs) based on the Puro Standard. Puro Standard is the first standard for carbon credits based on the carbon removed from the atmosphere and stored long-term in carbon net-negative processes or products. The methodologies of the Puro Standard are science-based and durable, and therefore dependable for precise compensation of emissions.

When creating the CORC we considered the requirements of companies who are looking to fulfill ambitious climate commitments and want to avoid reputational risks associated with low-quality carbon offsets. Therefore CORCs are:


Standard scientific equipment can measure the CO2 net-negativity of the products and we can determine the amount of CO2 captured and stored per tonne.



An independent third party, such as our partner DNV, a world leader in ISO certification, verifies the facility and product for carbon net-negativity at the “reasonable assurance” auditing level, higher in confidence than “limited assurance”.


Long term

All product methods are guaranteed to remove carbon from the atmosphere for at least 100 years, some for even thousands of years.


Industrial potential

The chosen carbon removal methods can be scaled at the industrial level.


Carbon removal methods based on biomass are required to be certified by the Forest Stewardship Council to prevent environmental, economic, and social negative consequences.

The CO2 removal actions of issued CORCs have already been completed prior to being issued. This eliminates the possibility of issuing more than one CORC for the same production output and limits vintage, as CORCs that have not been retired expire at 5 years from the issuing date. Each CO2 Removal Certificate (CORC) represents a volume of 1 (one) tonne of CO2 Removal and specifies the following attributes:


  • Certificate Unique identifier 
  • Issuance Date 
  • Country of Issue 
  • Removal Method 
  • Facility Identity, Name, and Location
  • Start and End dates of production output 
  • Date on which the Production Facility became eligible to receive CORCs 
  • Whether the Production Facility has benefited from public support 


CORCs can be a very cost-efficient way to compensate for unavoidable emissions. With our methodologies we have resolved one important aspect of efficiency: CORCs are a lot lower in overhead costs per tonne removed than CDMs.

CORCs can be part of a diversified carbon removal portfolio or a unique trusted instrument, which is at the same time a tool for motivating employees and delighting customers. Companies who have purchased CORCs to neutralize emissions report that the innovation has been well received and has positioned them as climate leaders.

How are carbon removals verified?

1. A supplier makes a claim to us on the net negativity of their products by presenting evidence: Lifecycle Assessment (LCA) or Environmental Product Declaration (EPD) which attests that the product has absorbed more CO2 than it has emitted.

2. Based on this evidence, compliance to the Puro Standard is audited by Puro.earth’s independent assessors, such as DNV GL, who visits the production facility, validates the accuracy of data, and issues an audit statement. The costs of the verification are covered by Puro.earth. 

3. The verified volume of extra carbon absorbed in the products is then issued CO2 Removal Certificates (CORCs) for every metric ton of CO2 removed and stored.

4. CORCs are sold directly bu suppliers or via channel partners to companies who want to neutralize their emissions by removals and become climate positive.


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