> For the complete documentation index, see [llms.txt](https://docs-integration.squake.earth/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs-integration.squake.earth/notable-changes/calculation-changes/defra-live-2024.md).

# Bus & Train According to DEFRA are Now Available

The **DEFRA 2024 methodology** for bus and train carbon emissions is now live in the SQUAKE API. It includes:

* **Updated emission factors** for local buses (London/non-London), coaches, and train services.
* **Energy scopes**: Supports **Tank-to-Wheel (TTW)** and **Well-to-Wheel (WTW, default)** emissions.
* **Granular classification**: Differentiates transport modes for improved accuracy.

Users can now retrieve DEFRA-compliant emissions data for **both buses and trains** via the API. For details, see [UK Government GHG factors](https://www.gov.uk/government/publications/greenhouse-gas-reporting-conversion-factors-2024).