To be considered for inclusion in a Carbon Removal Certificate, a carbon removal solution must meet both general and solution-specific criteria.  Below is an explanation of how we apply these criteria to the different carbon removal solution types.



  • The claimed carbon removal must be net of emissions required to generate the removal.
  • Appropriate buffer volumes should be included to address probable catastrophic events that could reverse part of the removal prior to the end of its expected lifecycle.


Direct Air Capture & Sequestration

Direct Air Capture (DAC) removals must quantifiably remove CO2 or other greenhouses gases (GHG) from the atmosphere and can only be considered when:

  • Paired with a storage/ sequestration solution that durably stores the captured GHG in geologically sable formations.
  • Deliver a net negative lifecycle considering plant setup, operation and decommissioning.
  • Are independent from GHG-generating operations (e.g. power plant), and therefore truly capturing atmospheric carbon.

Under these criteria, a DAC removal of 1T CO2 is considered as 1T of GHG removed when included in a Carbon Removal Certificate.


Bio-Oil with Sequestration

Bio-Oli removals can only be considered when:

  • Paired with sequestration into geological stable formations.
  • Delivers a net negative lifecycle considering production, transportation and injection of the bio-oil.


Under these criteria, the 1T of Bio-oil injected and stored is equal to approximately a net of 1.44 T CO2.  Details of the lifecycle available here.


Enhanced Weathering

There are several different forms of enhanced weathering and we are currently using the most immediate variant (finest grain) which removes 95% of the CO2 in less than 25 years.  Other variants take decades longer.  In addition, Enhanced Weathering removals can only be considered if they deliver a net negative lifecycle considering quarrying, transportation and distribution.