Carbon removal methods
Puro.earth CO2 Removal Certificates (CORCs) are based on Puro Standard's science-based quantification methodologies for carbon removal.
Puro.earth has pioneered five methodologies for certifying carbon removal. Each methodology outlines the carbon removal method system boundaries, formulas for calculating how much carbon is removed, environmental safeguards, and the documentation needed for independent verification of CORCs to be issued to a project.
Biochar
Durability
100+ years
Biomass or biowaste heated in the absence of oxygen (a thermochemical conversion named pyrolysis). A very stable, solid form of carbon that can endure in soil for hundreds or thousands of years. Multiple uses at potentially industrial volumes, for example, as greenhouse additive, in soil regeneration and in stormwater or wastewater treatment.
Biochar activities can also
Increase recycling and utilizing bio-waste
Improve agricultural productivity
Geologically Stored Carbon
Durability
1,000+ years
Geologically Stored Carbon (GSC) involves capturing carbon dioxide (CO2) and storing it in underground geological formations to permanently remove it from the atmosphere. The process includes capturing CO2 from sources like the atmosphere or bioenergy facilities, transporting it to a storage site, and
injecting it into deep geological formations, where it is securely trapped by impermeable rock layers and undergoes further chemical and physical processes to ensure its containment.
GSC activities can also
Improve sustainability of industries
Reduce adverse environmental impact of cities
Carbonated Materials
Durability
1,000+ years
By reacting with CO2, these materials mineralize and form carbonates, thereby trapping and storing the carbon dioxide for geological timespans. Offering a pathway to transform the environmental impact of an entire industry while utilizing industrial byproducts and waste materials such as steel slag mine tailings and alkaline waters.
Carbonated materials activities can also
Increase recycling and utilizing industrial waste streams
Transform an entire industry
Enhanced Rock Weathering
Durability
1,000+ years
A process that accelerates natural rock weathering that usually takes thousands of years. Rock weathering begins with the reaction between water, carbon dioxide and silicate rocks which breaks down the rock to then form bicarbonate, a durable form of carbon. When spread on agricultural land, the rock can be highly beneficial and can increase crop yields.
Enhanced rock weathering activities can also
Increase soil fertility and crop yield
Increase the buffer capacity in ocean
Terrestrial Storage of Biomass
Durability
100+ years
The storage of woody biomass in conditions that prevent decomposition and maintain carbon locked away for at least 100 years. A new innovative approach to immobilise carbon, that offers a unique opportunity for large-scale, affordable carbon removal.
Terrestrial Storage of Biomass activities can also
Enable landscape restoration
Reduce risk of biomass clogging waterways or roads
Certify your carbon removal
Make a positive difference and earn revenue for your net negative emissions by becoming a Puro.earth supplier
Neutralize your corporate emissions
Purchase CO2 Removal Certificates (CORCs) issued under the Puro Standard by browsing our supplier listings
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