> 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/base-empreinte-live-2025.md).

# Base Empreinte for Flights and Trains Now Live

The **BASE-EMPREINTE methodology** for flights and trains is now live in the SQUAKE API, based on the latest ADEME datasets.

### **Key Features**

* **Flights & Trains Emission Factors**: Uses ADEME’s **2025 Base Empreinte** environmental impact data.
* **Granular Methodology**: Factors in aircraft performance, fuel consumption, and train energy mix.
* **Compliance Ready**: Aligns with ADEME’s **Base Carbone Methodological Guide (2024)**.

Users can now retrieve BASE-EMPREINTE-compliant emissions data via the API.

### **Sources**

* ADEME (2025). [Base Empreinte - Données d’impacts environnementaux](https://www.ademe.fr/base-empreinte)
* ADEME (2024). [Base Carbone Methodological Guide](https://www.ademe.fr/base-carbone)
* ADEME (2023). Documentation on aviation emission factors.
* Eurocontrol (2022). Aircraft performance and fuel consumption statistics.


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