Dive into the detail of our pillars and grades. Plus, if you’d like to see your own carbon removal project on our site, see how it measures up.
9 Carbon Char Grades
Empowering decision-making
Our Carbon Char Grades – AAA to C – make choosing a carbon removal simple. they allow you to confidently compare the quality of different technologies from different projects.
Our 6 scoring pillars
We’ve developed 6 scoring pillars in collaboration with leading scientists at Edinburgh University. It’s the total score of all 6 pillars that equals a Carbon Char Grade.
Carbon Mass
The certainty of the mass of carbon removed from the atmosphere in kg.
Record Keeping
The quality of reporting on the carbon removal project.
Stability
The stability of the carbon once removed from the atmosphere.
Permanence
The length of time that the carbon will remain locked away based on existing scientific evidence.
Stewardship
The likelihood that the organisation in charge of the removal will look after it.
Additionality + Novelty
The certainty that your purchase made the removal happen and that it wouldn’t have happened without it; combined with how innovative the technology is.