# Flight: DEFRA - July 2024 Update DEFRA has updated the emission factors for greenhouse gas conversion. You can access the updated methodology here: [2024 Greenhouse Gas Conversion Factors Methodology](https://assets.publishing.service.gov.uk/media/668408e6a59289f59b840597/2024-greenhouse-gas-conversion-factors-methodology.pdf). Here is [Conversion factors 2024: full set (for advanced users)](https://assets.publishing.service.gov.uk/media/668408512a468a64f5dde5ea/ghg-conversion-factors-2024_full_set__for_advanced_users_.xlsx). ## What's New? ### Flight Classifications For flights starting or finishing in the UK: * **Domestic**: Both starts and finishes in the UK. * **Short-haul**: Under 3700 km, when either origin or destination is in the UK. * **Long-haul**: Above 3700 km, when either origin or destination is in the UK. * **International**: When either origin or destination is in the UK. ### Updated Logic All other aspects of the logic remain the same as in previous versions. ### Updated Factors * New emission factors for averaged aircraft type were published. * Aircraft-specific information on emission factors will be available in the future (2025). --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs-integration.squake.earth/notable-changes/calculation-changes/flight-defra-july-2024.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.