Carbon DirectoryUnited Kingdom
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About the project

Transparent by design.

We organise public claims and their sources. We do not turn those claims into independent certification.

Our sources

What we look at.

Search-assisted discovery can find candidates, but a source URL is required and every candidate remains a company claim—not an independently established fact.

Company websites

Public sustainability, impact and service pages published by a business.

Reports & plans

Sustainability reports and publicly available carbon reduction plans.

Certification pages

Public records or pages from a named certification or accounting scheme.

User submissions

Suggested companies, always reviewed against a source before inclusion.

Methodology

From discovery to listing.

  1. 01

    Discover

    A public page, report, plan or submission identifies a possible carbon-related claim.

  2. 02

    Review

    We record the wording, source URL, source type and the date it was checked.

  3. 03

    Label

    The claim type and review status describe the evidence available to the directory—not the company’s overall impact.

  4. 04

    Re-check

    Evidence links can be re-checked and changes are queued for human review.

Claim types

Labels describe different things.

These categories summarise what a source appears to claim. They do not make the underlying claim true or equivalent to another category.

Carbon Neutral

The company publicly claims that defined emissions have been balanced through reductions and/or offsets. Scope and period can vary.

Certified Carbon Neutral

The company publicly claims carbon-neutral status with involvement from a named certification body, standard or third-party scheme.

Carbon Measured

The company has measured or reported emissions. This does not necessarily mean it is carbon neutral.

Carbon Reduction Plan

The company publishes a plan to reduce emissions, often linked to procurement requirements or net-zero goals.

Net Zero

The company states a target or commitment to reduce emissions in line with its stated net-zero goal. A target is not proof it has already been reached.

Other Public Sustainability Claim

A relevant public sustainability claim that does not fit the categories above. The precise wording and source should be checked.

Corrections are welcome

Companies and readers can request a correction or removal, or provide a newer source. Every request is reviewed manually; inclusion never equals endorsement.

Request removal or correction

Verify for procurement

Before a commercial or procurement decision, contact the company and request current accounting boundaries, methodology, reductions, offsets and certification details.

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