Method: watts = primary-energy kWh per person-year ÷ 8.76. Non-renewable primary energy (physical/CED method), dual CO2e accounting. Food, goods & public services are country-average shares adjusted by diet.
Land: occupation in hectares per person-year — fair share 0.65 ha = half of habitable land ÷ world population
- Country grid CO2e intensity & generation mix: Ember via Our World in Data (CC BY), per-country latest year (priv/countries.csv)
- Grid primary-energy factors: physical/CED method per source (data/factors/grid_pef_by_source.csv)
- Fuel energy & CO2: IPCC 2006 defaults (data/factors/fuel_properties.csv)
- Aviation CO2e: DEFRA/DESNZ GHG conversion factors 2026, average passenger, incl. radiative forcing
- Food CO2e: Scarborough et al. 2014 (BMJ Open), absolute per-diet values incl. land-use change — EXIOBASE omits land-use change, so it cannot carry the diet signal
- Background sector shares: nutrition/housing/mobility Jungbluth/Itten/Stucki 2012 (ESU-services for BAFU); goods/services split is an interim default pending EXIOBASE 2022 extraction
- Diet land: Scarborough et al. 2023, Nature Food (PMC10365988), Table 4 medians; extreme-meat tier (500 g+/day) scaled from the high-meat 97.5th percentile (60.84 m²/day ≈ 2.2 ha), CO2 from the high-meat minus vegan baseline × 3.85 + vegan
- Electricity/heating land: UNECE 2021 LCA lifecycle medians; oil & bioenergy from the Half-Earth Socialism game (github.com/frnsys/half_earth)
- Wood heat land: forest-yield derivation (Daugaviete et al. 2020; UK Forest Research JWEE)
- Car land: Chester et al. 2010 + FHWA road/parking flow attribution
- Background land bases: FAO/OWID land aggregates (order-of-magnitude); clothing incl. leather pasture, goods incl. metals/minerals mining
- Fair share 0.65 ha: half of habitable land (107 Mkm², OWID) ÷ 8.2 B people