Materials

What the work was done with, as its author lists it, so someone else can get the same things and do it again.

Other
Final GCB 2025 national fossil carbon workbook
https://meta.icos-cp.eu/objects/loCXyssaalv6DPdO6Qdj90qQ
CC-BY-4.0 workbook, SHA-256 verified against ICOS metadata. Frozen bytes in data/national-fossil-2025.xlsx; national consumption estimates through 2023.
Other
World Bank WDI GDP and economy-list API snapshots
https://api.worldbank.org/v2/
CC-BY-4.0; NY.GDP.MKTP.KD in constant 2015 US dollars, 2005-2024 query; only 2005-2023 used. Source release 2026-07-13. Frozen JSON responses and exact URLs, hashes, retrieval timestamp in data/sources.json.
Software
Python 3.12 with openpyxl 3.1.5
https://pypi.org/project/openpyxl/3.1.5/
Pinned env/requirements.txt. Main extraction with openpyxl; independent source XML parser uses Python standard library and Fraction.

Study

Opening the study…