Carbon Removal Methods
The Puro Standard for carbon removal is used to issue science-based certificates that represent actual carbon that has been removed from the atmosphere. Our verification process requires scientific measurement and quantification of the removed carbon in the product or process and carbon net-negativity in its production, from cradle-to-gate.
Methodologies
Biochar
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). |  |
Carbonated Materials
Manufactured carbonated materials that remove more CO2 than the production emits. By reacting with CO2, these materials form carbonates, thereby trapping and storing the carbon dioxide for 1,000+ years. This process offers the potential for the utilization of industrial byproducts and waste materials such as steel slag, mine tailings and alkaline wastes, reducing their environmental impact while creating value through carbon removal. |  |
Enhanced Rock Weathering
Enhanced rock weathering is a process that aims to accelerate natural rock weathering where carbon dioxide reacts with rocks, a process that usually takes thousands of years. Silicate weathering begins with the reaction between water, carbon dioxide and silicate rocks which breaks down the rock. Puro.earth has developed the world's first carbon crediting methodology for Enhanced Rock Weathering. |  |
Geologically Removed Carbon
Carbon capture processes such as DACCS, BECCS and Bio-CCS combined with geological storage, such as direct injection of CO2 into deep geological formations and oil and gas reservoirs as part of EOR+, offer a permanent carbon removal pathway. Puro.earth's Geologically Stored Carbon methodology does not cover capturing CO2 from fossil fuels, only from biogenic sources. |  |
Woody Biomass
Woody Biomass Burial is an innovative approach that offers a unique opportunity for large scale, affordable and fully additional carbon removal. The methodology cover activities capable of burying woody biomass under conditions that inhibit biomass decomposition and can maintain those conditions for containment of the stored carbon for at least 100 years. The eligible activity must be net-negative in terms of the overall carbon footprint. Projects registered before 1 December 2023 can be verified according to this pilot methodology. |  |
