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The UK Government issues emission conversion factors for use by UK and international organisations to report on greenhouse gas emissions. The key responsible departments / agencies are / were: BEIS , DEFRA, DESNZ and NAEI.

Climate TRACE (Tracking Real-Time Atmospheric Carbon Emissions) is a collaborative initiative aimed at providing precise, real-time tracking of global greenhouse gas emissions using artificial intelligence, satellite image processing and other remote sensing technologies along with academic research and publicly available data.

ecoinvent is a Swiss not-for-profit association that provides a Life Cycle Inventory (LCI) database that supports various types of sustainability assessments. This data enables users to gain a deeper understanding of the environmental impacts of their products and services.

Greenview is a sustainability platform that provides the Hotel Footprinting Tool, utilizing data from over 27,000 hotels in the Cornell Hotel Sustainability Benchmarking index.

The International Energy Agency (IEA) provides comprehensive electricity emission factors, which are essential for understanding the carbon footprint of electricity generation across different regions and energy sources. These factors assist governments, businesses, and researchers in measuring the environmental impact of electricity consumption and in developing strategies for reducing greenhouse gas emissions in the energy sector.

The Ministry for the Environment (MfE) is the government agency responsible for environmental policy and regulation in New Zealand, providing guidance and resources on greenhouse gas (GHG) accounting and reporting including emission factors of different GHG emissions sources.