Carbon Removal Methods CO2 Removal Certificates or CORCs, are based on 3 science-based quantification methodologies that remove CO2 at an industrial scale.


Science-based certificates must represent the real CO2 removed from the atmosphere. Our verification process requires scientific measurement and quantification of the removed carbon in the product and carbon net-negativity in the production, from cradle-to-gate.

So far, we have identified three carbon removal methods that have significant volume potential and where costs are reasonable. CO2 Removal Certificates (CORCs) are issued for each metric ton of CO2 equivalent.

How to buy CORCs


A very stable, solid form of carbon that can endure in soil for thousands of years, making it an ideal technology for scalable carbon removal.

It has multiple commercial uses at potentially industrial volumes, for example, as greenhouse additive, in soil regeneration and in wastewater treatment. It is produced from biomass or biowaste, through pyrolysis (heated in the absence of oxygen).


Buy carbon removals from biochar

Carbonated Building Elements

Manufactured concrete-like building elements from steel slag (waste material from steel industry) instead of traditional cement. Basically, it’s CO2 negative concrete that removes more CO2 than its production emits.

During the hardening phase CO2 is chemically bound and mineralised permanently into the building element. Benefits of the method include easy measurability and storage of CO2 for good.



Wooden Building Elements

Growing trees continously capture carbon but the carbon may go back to circulation if the trees decompose or are used for paper or energy. The earliest point in the value chain where the only economically viable option is to keep the CO2 away from circulation for the long-term is what we call ”the first point of no return" principle.

In Europe, buildings are regulated to have a minimum lifetime of 50 years, and in real life the CO2 storage is likely to be longer. The cycle of making wooden building elements from sustainable forestry is a vital carbon removal pathway. By storing CO2 for a minimum of 50 years, wooden building elements present an opportunity for companies to invest in carbon capture and storage.

Buy carbon removals from wooden building elements

A methodology provides procedures to verify the compliance of CO2 removal activity with the removal method. It specifies the system boundaries, detailed calculation formulas and the proof needed for the issuance of CORCs from each removal method. Download's Rules and Methodologies.

Read more about our suppliers

Book a meeting
Book a Meeting with one of our advisors to learn how you can use these carbon removal methods to neutralize emissions.
loder image