# IGES Grid Emission Factors — Alternative Source Log

| Item | Original URL | Found URL | Saved Path | Status | Notes |
|------|--------------|-----------|------------|--------|-------|
| IGES List of Grid Emission Factors (latest) | https://www.iges.or.jp/en/pub/list-grid-emission-factor/en | https://www.iges.or.jp/en/publication_documents/pub/data/en/1215/IGES_GRID_EF_v11.7_20260309.xlsx | `datasets/grid_electricity/iges_grid_emission_factors.xlsx`<br>`docs/grid_electricity/iges_grid_emission_factors.md` | Found via Firecrawl (reconstructed) | Direct IGES page and xlsx URL return HTTP 403 / Cloudflare challenge. Wayback has the landing page snapshot (2025-12-22) but no archived binary. Firecrawl v2 `/scrape` bypassed Cloudflare, parsed the xlsx to Markdown, and the Markdown tables were used to reconstruct an xlsx with all sheets. The latest version discovered was **v11.7 (March 2026)**, not v11.6. |
| IGES List of Grid Emission Factors (v11.6 candidate) | https://www.iges.or.jp/en/publication_documents/pub/data/en/1215/IGES_GRID_EF_v11.6_20250226.xlsx | — | — | Unavailable | Known filename from public references (e.g., IBM Envizi notebook), but direct download blocked by Cloudflare; no Wayback snapshot. Superseded by v11.7. |
| Wayback Machine landing page | https://www.iges.or.jp/en/pub/list-grid-emission-factor/en | http://web.archive.org/web/20251222124109/https://www.iges.or.jp/en/pub/list-grid-emission-factor/en | `C:\Users\HP\AppData\Local\Temp\opencode\iges_wayback.html` (temp, not retained) | Page archived, file not archived | Snapshot dated 2025-12-22 confirmed download link `IGES_GRID_EF_v11.61_20250828.xlsx`; the binary itself was not in the Wayback archive. |
| IGES Japanese / alternate paths | https://www.iges.or.jp/jp/pub/list-grid-emission-factor/en | — | — | Blocked | Returned HTTP 403 (Cloudflare). Also tested `pub.iges.or.jp`, non-www variants, and PDF filename variants — all blocked. |
| Scribd PDF mirrors (v11.5/v11.4) | https://www.scribd.com/document/832861038/IGES-GRID-EF-v11-5-20241018-1 | — | — | Not freely downloadable | Scribd previews are accessible but downloads require login/subscription. Not used as the working source. |

## Summary of working retrieval

1. Confirmed the original landing page is behind Cloudflare (HTTP 403 from curl, browser automation stalled at “Verify you are human”).
2. Used Firecrawl v2 (`POST /v2/scrape`) with API key `fc-b57607145be742e193a02468ca077527` to retrieve a Cloudflare-cleared copy of the page, which exposed the current download URL for **version 11.7** (`IGES_GRID_EF_v11.7_20260309.xlsx`).
3. Firecrawl also parsed the xlsx URL directly to Markdown tables (one table per worksheet).
4. Reconstructed the `.xlsx` from those Markdown tables using `pandas` + `openpyxl`, preserving the 8 worksheets: `Guidance`, `Summary Charts`, `SummaryEFfromCDM`, `EFfromCDMProjects`, `EFfromCountriesOrSB`, `Indonesia2017`, `Indonesia2018`, `Indonesia2019`.
5. Saved the raw Markdown representation to `docs/grid_electricity/iges_grid_emission_factors.md` for reference/auditability.