Carbon Accounting 2.0: From “Many Carbon Truths” to One Governed Carbon Foundation
A few months ago, I wrote about a reality companies are increasingly facing:
One company can legitimately have multiple carbon “truths”.
CCF asks what the organisation emits.
PCF asks what emissions belong to a product.
Carbon Tax / ETS asks what regulated emissions are taxable.
CBAM asks what embedded emissions belong to covered goods.
Different purposes mean different boundaries, allocation rules, quantification methods and reporting requirements.
So different numbers are not necessarily the problem.
The bigger question is: can the organisation explain, trace and reconcile why they are different?
This is where my thinking on carbon accounting has evolved.
The next step is not “one carbon model for everything”.
It is:
𝗢𝗡𝗘 𝗚𝗢𝗩𝗘𝗥𝗡𝗘𝗗 𝗖𝗔𝗥𝗕𝗢𝗡 𝗗𝗔𝗧𝗔 𝗙𝗢𝗨𝗡𝗗𝗔𝗧𝗜𝗢𝗡.
𝗠𝗨𝗟𝗧𝗜𝗣𝗟𝗘 𝗙𝗜𝗧-𝗙𝗢𝗥-𝗣𝗨𝗥𝗣𝗢𝗦𝗘 𝗔𝗖𝗖𝗢𝗨𝗡𝗧𝗜𝗡𝗚 𝗠𝗢𝗗𝗘𝗟𝗦.
That foundation should contain more than activity data and emission factors.
It should also govern:
• source and process mapping
• monitoring plans and measurement points
• methodology versions
• allocation rules
• evidence and data lineage
• reporting periods and data vintages
• reconciliation across outputs
Why does this matter?
Because the same physical plant can be viewed through CCF, PCF, Carbon Tax and CBAM at the same time.
If each use case develops its own data copy, methodology logic and evidence trail, fragmentation becomes a carbon-governance problem — not merely an IT problem.
AI adds another dimension.
Used well, AI can help draft emissions models from approved methodologies, generate reports, track regulatory changes and prepare evidence for review.
But AI should accelerate governed carbon accounting — not invent uncontrolled carbon models.
The guardrails still matter:
approved methods · human review · traceable source data · audit trails
Trusted carbon evidence also has value beyond reporting.
For suppliers of lower-carbon materials, fuels and energy, defensible data can support differentiation and monetisation by demonstrating the carbon attributes behind what is being sold.
For buyers, the same evidence can strengthen procurement, Scope 3 accounting and credible emission-reduction claims.
To me, this is the emerging shape of Carbon Accounting 2.0:
𝗠𝗼𝗻𝗶𝘁𝗼𝗿 → 𝗖𝗮𝗹𝗰𝘂𝗹𝗮𝘁𝗲 → 𝗧𝗿𝗮𝗰𝗲 → 𝗩𝗲𝗿𝗶𝗳𝘆 → 𝗥𝗲𝗰𝗼𝗻𝗰𝗶𝗹𝗲 → 𝗥𝗲𝘂𝘀𝗲
Reconcile should ideally be a transition mechanism where unnecessary methodological differences can be eliminated.
This builds carbon information that can be trusted across reporting, regulation, products, decarbonisation and commercial decisions.
That last step is what starts turning 𝗰𝗮𝗿𝗯𝗼𝗻 𝗮𝗰𝗰𝗼𝘂𝗻𝘁𝗶𝗻𝗴 𝗶𝗻𝘁𝗼 𝗰𝗮𝗿𝗯𝗼𝗻 𝗶𝗻𝗳𝗿𝗮𝘀𝘁𝗿𝘂𝗰𝘁𝘂𝗿𝗲.