The GreenCalculus changelog is the public audit trail for every substantive change to our emissions calculators, methodology pages, the MasterBrain data layer, and platform infrastructure, logged day by day as it ships. Each entry records what changed, the old and new values, and the governing source (GHG Protocol, IPCC AR6, DEFRA 2025, PCAF, and others), so practitioners can trace any factor back to its standard and edition.
Entries are authored by Jeremiah Say and verified by the GreenCalculus Engineering pipeline before publication. Subscribe to the RSS feed to track factor source updates, and see what is due next on the update schedule. Spotted an error? Email jeremiah@greencalculus.com — corrections are credited by name in the next entry.
- PluginPatch
12 November 2026
Montana electricity rates (v1.1 → v1.2): the merger section was written ahead of the Public Service Commission's 10 November 2026 vote and said only that the vote was scheduled. The commission approved…
- PluginPatch
11 November 2026
Tennessee electricity rates (v2.0 → v2.0.1): the data center section said the TVA board would next meet on 10 November 2026 and that we had booked a check. It now gives the…
- PluginPatch
10 November 2026
Two weekly tracker updates, found by the gc-issb-watch and gc-omnibus-watch checks. • ISSB adoption tracker: the IFRS Foundation published a jurisdictional snapshot for Peru (dated 4 November 2026) and updated its page…
- PluginPatch
9 November 2026
Page 2.1 → 2.2. Correction: the UI 700 kWh bill on /data/connecticut-electricity-rates/ used rates from before UI's tariff of 1 September 2026, and described its systems benefits line as a credit. It…
- PluginPatch
8 November 2026
A reader asked whether the page's cubic feet were standard cubic feet. They are, and the page now says so: "Cubic foot" is now "Standard cubic foot (scf)" and "100 cubic feet…
- v6.1776.0 → 6.1776.9PluginPatch
7 November 2026
Ready to publish. The True Natural Gas fixed plan now shows the PSC chart's note that in the Rome delivery group it is for existing customers only, in the table and the…
- v6.1772.0 → 6.1775.41PluginMinor
6 November 2026
/factors/ on a phone: the group links scroll in one row, so the bar is no longer 303px at rest. /sources/ now loads sticky-collapse.js, so its pinned bar collapses; the result count…
- v2026.281 → 2026.284Data layerMinor
6 November 2026 · Data layer
DATA — SBTi 4.2% rate recorded as a floor. ─────────────────────────────────────────────── Our row reporting.sbti.near_term.aca.annual_reduction_rate described 4.2% as the minimum rate. Since V1.3.1 it is a floor under a minimum that depends on the…
- v6.1771.1 → 6.1771.18PluginPatch
5 November 2026
The F-Gas Containment and Scope 1 Register now says the regulation sets its own GWP basis. The Safeguard Mechanism Position Checker now says the ERC decline factor is written into the Rules.…
- v2026.280 → 2026.281Data layerMinor
4 November 2026 · Data layer
DATA — Monthly re-checks of four US energy and climate sources: no values changed. ─────────────────────────────────────────────── Four checks on our update schedule were due by 5 November. We re-read each source against its…
- v6.1770.4 → 6.1771.0PluginMinor
4 November 2026
State pages now draw the hub's tile map in "Electricity rates in other states", with the page's own state ringed and each tile's title giving the difference from it; the chip list…
- v2026.279 → 2026.280Data layerMinor
3 November 2026 · Data layer
DATA — Building embodied-carbon benchmarks corrected. ─────────────────────────────────────────────── We checked our building benchmarks against the documents they cite and found three faults. 1. Our "business as usual" (offices 1,700, homes 1,750 kgCO₂e/m²) and…
- v6.1764.0 → 6.1770.3PluginMinor
3 November 2026
CHANGE — the founder's Person sameAs now lists his pages on the company's two newest sites: numbers.sg/about/jeremiah-say/ and whoactuallymakes.com/about/ (Who Actually Makes keeps its founder profile on /about/), plus quitwithnerd.com/about/, his personal…
- v6.1758.0 → 6.1763.0PluginMinor
2 November 2026
New shortcode [gc_dma] for the double materiality assessment tool page (/tools/double-materiality-assessment/, build plan row 119). It is a scoring workbench: the reader lists impacts, risks and opportunities against the sub-topics of ESRS…
- v6.1754.0 → 6.1757.1PluginMinor
1 November 2026
[gc_ppa] example note reworded: "solar earns less than the hub's all-hours average" is now "solar's output can fetch less than the hub's all-hours average", because LBNL reports this as a regional pattern,…
- v6.1748.0 → 6.1753.0PluginMinor
31 October 2026
The IMO CII rating API is now listed wherever the API is described. /developers/, /developers/agents/, llms.txt and llms-full.txt list POST /v1/calculate/cii and the calculate_cii MCP tool. The counts move from seven calculation…
- v2026.276 → 2026.279Data layerMinor
31 October 2026 · Data layer
DATA — IMO Carbon Intensity Indicator (CII) parameters. ─────────────────────────────────────────────── Added the numbers the International Maritime Organization (IMO) uses to rate a ship's carbon intensity from A to E, taken from the IMO…
- v2026.272 → 2026.276Data layerMinor
30 October 2026 · Data layer
DATA — Carbon removal cost ranges: stored where our pages can read them. ─────────────────────────────────────────────── The 13 carbon removal cost ranges added in v2026.275 now keep their low and high ends in the…
- v6.1739.0 → 6.1747.0PluginMinor
30 October 2026
The pictures at the top of the BECCS, biochar, direct air capture and ocean alkalinity enhancement pages now quote the 2026 State of Carbon Dioxide Removal report: BECCS removed 0.51 million tonnes…
- v6.1725.0 → 6.1738.0PluginMinor
29 October 2026
New read-only endpoint GET /wp-json/numbers-publishing/v1/trust (inc/rest/company-trust.php). It returns GreenCalculus's own track record in the shape all five Numbers Publishing sites share: start year, emission factor and calculator counts (the same figures the…
- v6.1721.0 → 6.1724.0PluginMinor
28 October 2026
Three new parts for [gc_pt_chart], so each refrigerant PT chart page says something a published chart does not. part="errors": what common mistakes do to superheat (suction at 40 °F) and subcooling (liquid…
- v6.1710.0 → 6.1720.0PluginMinor
27 October 2026
Links between API pages now end in a slash. The "Related APIs" list on each /developers/api// page and the topic cards on /developers/api/ linked to /developers/api/ without the trailing slash, so every…
- v6.1704.0 → 6.1709.0PluginMinor
26 October 2026
SCHEMA — Organization sameAs no longer lists the Reddit profile u/greencalculus: Reddit suspended the account on 26 Oct 2026, so the link pointed search engines at a suspended profile. Re-add it if…
- v2026.270 → 2026.272Data layerMinor
26 October 2026 · Data layer
DATA — EU Pay Transparency Directive thresholds and dates, for the pay gap reporting checker. ─────────────────────────────────────────────── Added the reporting rules of Directive (EU) 2023/970, each quoted from the Official Journal: employers with…
- v6.1703.0PluginPatch
24 October 2026
SCHEMA — OFF-SITE DATASET PARENT IS A PLAIN URL. Google Search Console reported "Invalid object type for field 'isPartOf'" (Data sets, non-critical) after v6.1698.0 made the link from four data-centre /data/ pages…