Data sources and licences

Every factor in a result links to one of these sources by row ID. Attribution is required by their licences.

UK Government GHG Conversion Factors for Company Reporting 2026 (DESNZ / DEFRA)

Fuels, freight, business travel, hotel, waste, materials, refrigerants. Each result names the row ID it used.

Open Government Licence v3.0. Contains public sector information licensed under the Open Government Licence v3.0. https://www.gov.uk/government/publications/greenhouse-gas-reporting-conversion-factors-2026

Türkiye Ministry of Energy and Natural Resources (EVÇED): Türkiye electricity generation and consumption-point emission factors, form ETKB-EVÇED-FRM-042, calculation period 2023, published 26.12.2025

Official Türkiye grid factors for location-based electricity (Scope 2): 0.469 tCO₂e/MWh for distribution-connected and 0.436 for transmission-connected consumption points.

Official publication of a public body. No reuse licence is stated on the document; the ministry disclaims liability for use. Attribution given here. https://enerji.gov.tr/Media/Dizin/EVCED/tr/%C3%87evreVe%C4%B0klim/%C4%B0klimDe%C4%9Fi%C5%9Fikli%C4%9Fi/EmisyonFaktorleri/2023_Turkiye_Elektrik_UretimiveElektrik_Tuketim_Noktasi_Emisyon_Faktorleri.pdf

European Commission: CBAM default values (Implementing Regulation (EU) 2025/2621 as corrected by (EU) 2026/1740)

Default embedded emissions per CN code for Türkiye and other countries. The binding values are in the regulations; the Commission Excel used here is informative.

EU legal text and Commission documents, reuse permitted under the Commission reuse policy. https://taxation-customs.ec.europa.eu/carbon-border-adjustment-mechanism/cbam-legislation-and-guidance_en

Türkiye 2025 National Inventory Document (UNFCCC submission, TUR_NID_2025)

Türkiye national CO₂ emission factors (Table 3.7) and net calorific values (annex, 2023) for 10 fuels such as lignite, hard coal, fuel oil and natural gas. CO₂ only.

Official national submission to the UNFCCC; no reuse licence stated. Attribution given here. https://unfccc.int/ghg-inventories-annex-i-parties/2025

Commission Implementing Regulation (EU) 2025/2547 (CBAM calculation methods)

Method, standard fuel and process factors, global warming potentials, precursor and attribution rules used by the CBAM module.

EU legal text. https://eur-lex.europa.eu/eli/reg_impl/2025/2547/oj

OpenStreetMap road network, via OSRM routing (driving distances between the preset places)

Road distance for road legs between the places in the list, so they use a real driving distance instead of the straight line. Built once as a data table; custom points use the straight line times the median road-to-straight-line ratio from the same table.

searoute-py maritime lane network (shortest sea distances between the preset ports)

Sea distance for sea legs between any two ports or coastal points, computed on the server over its maritime lane network so legs follow the shipping lanes (for example via Gibraltar or Suez) instead of the straight line. It is an approximation of the shortest feasible sea distance, not a navigational figure; short hops under 300 km use the straight line.

searoute-py is Apache-2.0. The lane network is bundled and searched on our own server; nothing is called at run time. https://github.com/genthalili/searoute-py

Natural Earth (cities, ports, country outlines) and OurAirports (airports)

The searchable list of cities, ports and airports behind the place pickers, and the Türkiye–Europe map on the home page.

Both are public domain. https://www.naturalearthdata.com/

Regulation (EU) 2025/40 on packaging and packaging waste (PPWR)

Recycled-content targets (Art. 7), recyclability grades (Art. 6, Annex II Table 3), application date (Art. 71).

EU legal text. https://eur-lex.europa.eu/eli/reg/2025/40/oj

Typefaces: Fraunces, Libre Franklin and IBM Plex Mono (SIL Open Font Licence).

Not used: the Commission's grid-electricity defaults for CBAM (Annex II of 2025/2621) come from IEA data licensed for non-commercial use only, so they are not built in. ISO 14083 and ISO 14067 are paywalled standards that we have not read; the freight method follows the GLEC Framework v3.0 where checked.