CO2 removal methods are independently verified by DNV GL

Supplier verification

The certified suppliers have gone through a rigorous verification process to confirm that the products are truly carbon net-negative. We take into consideration their lifecycle from cradle-to-gate and require scientific measurement and quantification of the removed CO2 and its residence time in storage.

For more details download the Marketplace Rules and Methodologies documentation.


Verification process

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 that it has emitted.

2. Based on this evidence, compliance to Puro methodology requirements is done by Puro’s independent assessor, DNV GL, who visits the production facility, validates the accuracy of data and issues an audit statement.

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 in the marketplace to companies who want to neutralize their emissions by removals and become climate positive.


Become a supplier

Do you have a method that complies with the rules & methodologies of

Apply to become a supplier. methods are independently verified by 

EnergyLink Services




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If you didn’t find the answer to your question on our site, please book a Q&A session with our Supplier Manager Roosa.

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