A per-tonne evidentiary record would fix more of the carbon market than any regulatory reform currently on the table
Why this recipient benefits: The argument that per-tonne evidentiary disclosure is a small market-architecture change that produces disproportionately large market-quality outcome fits the Economist's signature analytical arc exactly. Author anonymity means the piece can be framed tightly on the mechanism without biographical distraction.
Why now: Carbon-market integrity is a live Economist beat; 2026 regulatory milestones (CRCF, US federal procurement) produce the news peg.
The ask: Background briefing for Carr's section. We supply the mechanism analysis, not the story. Independent evaluator list available.
The Economist specialises in arguments of the form 'a small change in market architecture produces a large change in outcome.' Proof packs are exactly that argument: an evidentiary-layer change at the per-tonne level shifts carbon markets from opaque to legible.
Dear Editor,
The voluntary carbon market's credibility problem is often described as a regulatory failure. The analysis is wrong. The regulatory regime is not absent — the Integrity Council for the Voluntary Carbon Market, the Voluntary Carbon Markets Integrity Initiative, the Science Based Targets initiative, and several registries operate a layered structure of principles, codes, and methodologies. The problem is that none of this regulatory superstructure changes the per-tonne evidentiary record a buyer receives at the point of retirement.
The per-tonne record is, in most cases today, a registry serial number and a methodology reference. An auditor who is asked to verify that the tonne was real cannot do so. A journalist who is asked to evaluate a corporate claim can at best triangulate from methodology documents and aggregate registry data. A researcher who wishes to replicate a quality study must reconstruct the per-project record from fragmentary sources.
A January paper in npj Climate Action by Christopher Reinhard and Noah Planavsky called for what they termed radical transparency: methodology, cost decomposition, and verification pathway open for every tonne. Trellison Institute, a methodology-evaluation research unit, has been building a reference implementation of that call. We call the artefact a proof pack: a signed per-tonne record that binds methodology attestation, sensor data, cost decomposition, co-benefit ledger, and audit hooks.
The argument for such an architecture is a market-design argument. A commodity market functions when an arbitrageur can act on the difference between published price and published quality. Today, the voluntary carbon market does not support such arbitrage because quality is not observable at the tonne level. A per-tonne evidentiary record makes it observable. Once quality is observable, prices bifurcate: high-quality tonnes trade at a premium, low-quality tonnes trade at a discount, and the market does what markets do when information asymmetry is reduced.
The same logic applies to compliance markets. The EU Carbon Removal Certification Framework is approaching operational deployment. Registries that cannot produce per-tonne evidence of CRCF-aligned properties will lose market access. Buyers who require such evidence will get it.
The Economist reader already understands that a change in market architecture can produce a change in outcome that is disproportionate to the scale of the change. Proof packs are a test of that thesis. If the carbon market adopts a per-tonne evidentiary record, the market's credibility problem reduces to a measurement problem — and measurement problems are the kind science is good at. If it does not, then no amount of regulatory superstructure will close the gap, and the market will continue to under-deliver on its political and economic promise.
— Rob Stillwell
Director, Trellison Institute
[email protected]