Sources & references

Every figure on the site traces back to one of these. No guesses.

• Food footprints: Our World in Data — Poore, J. & Nemecek, T. (2018), “Reducing food's environmental impacts through producers and consumers”, Science 360(6392), 987–992. Licensed CC-BY 4.0.
• Transport & serving conversions: UK Government GHG Conversion Factors for Company Reporting (DEFRA, 2022/2024). Open Government Licence v3.0.

Used with attribution under those licences. The methodology covers how each one is applied.