What: Train emissions via the US EPA GHG Emission Factors Hub. Factors in gCO₂e/pax‑km (CO₂, CH₄, N₂O). If methodology_version is omitted, latest supported year is used.
methodology_version
Supported train_type: intercity_northeast_corridor, intercity_other_routes, intercity_national_average (default), commuter_rail, transit_rail.
train_type
intercity_northeast_corridor
intercity_other_routes
intercity_national_average
commuter_rail
transit_rail
Do now: Use US‑EPA for U.S. rail; add "methodology_version" if you need fixed‑year reproducibility.
"methodology_version"
Source: US EPA — GHG Emission Factors Hub.
Last updated 6 months ago
