Heirloom Carbon

Does the core business genuinely avoid or reduce emissions, or build climate resilience? Share of revenue that is actually 'green'. Fossil-dependent models score low.

Heirloom's core business is genuine atmospheric CO2 removal via permanent geological or concrete storage, with an operational 1,000 tonne/year facility and a credible pathway to 300,000+ tonnes/year — directly addressing legacy emissions, not just avoided emissions; score docked slightly because current operational scale is tiny relative to climate need and the kiln calcination step carries its own energy/emissions footprint that is not fully publicly quantified.

Credible, science-based targets (SBTi), a real net-zero plan with progress to date, and CDP disclosure — not just a dated press release.

No SBTi-validated targets, CDP disclosure, or independently verified net-zero roadmap for Heirloom's own operations were found in public records; the company's headline '1 billion tonnes by 2035' is a voluntary aspirational goal with no published science-based pathway, interim milestones, or third-party validation, which materially limits score.

Operational footprint, labour and social practices, and governance quality across the company's own operations and supply chain.

Strong labour practices (union construction at Tracy, IBEW/UA Pipefitters), explicit no-EOR and no-oil-equity principles, community governance models at both Tracy and Louisiana facilities, and 100% additional renewable energy powering operations are meaningful positives; score is moderated by the absence of a published Scope 1/2/3 inventory, supply-chain labour standards, or diversity disclosures.

Quality of disclosure, independent third-party verification, and how much hard data backs the company's claims.

Heirloom provides meaningful project-level disclosure (DOE fact sheets, Mitsui/Mitsubishi investor materials, press releases) and claims third-party monitoring of each credit, but has not published a standalone sustainability report, a full lifecycle analysis of its net removal accounting (including kiln emissions), a Scope 1/2/3 GHG inventory, or CDP response — leaving key verification gaps that prevent a high score.

Controversies, litigation, pollution, fossil-fuel lobbying, conflict-zone involvement and governance scandals. Higher means cleaner.

No material controversies, litigation, pollution incidents, fossil-fuel lobbying ties, or governance scandals were identified; the company's explicit no-EOR policy and no-oil-equity principle are proactive integrity commitments that strengthen this score.