Appendix I: Methodology
How we calculate a carbon footprint
Carbon accounting methodology disclaimer
Carbon accounting guidance and emission factors provided by external bodies such as DEFRA/DESNZ and the GHG Protocol may be subject to change periodically due to improvements in data quality, calculation methods, and industry best practices. As these updates are outside Positive Planet’s control, we may need to remeasure and restate emissions occasionally for previous years to ensure comparability and alignment with current standards, maintaining the accuracy of emissions data and the integrity of Net Zero targets. Where this is necessary in the future, our approach will be to remeasure the previous measurement year and base year, alongside the most recent measurement.
Positive Planet’s GHG Emissions Reports are carried out in accordance with the GHG Emissions Protocol Accounting and Reporting Standard. Using the most widely recognised and used emission standard in the world ensures all measurements, calculations and reporting are completed to the most consistent and accurate standards possible. Positive Planet was supplied information by Havwoods covering each of the emission sources included within their emissions inventory. Greenhouse gas emissions were calculated based on relevant emission factors. The provided data has been subject to high level review, but not verification to source. Using the GHG Emissions Protocol Standard, business emissions are identified using three scopes of emissions. Seven Greenhouse Gases are calculated as part this emissions report, known as the seven Kyoto Protocol GHGs. These gases occur the most often as a result of business activities, with the highest Global Warming Potential. Throughout this Report,Havwoods’ emissions are reported in tonnes of carbon dioxide equivalent (tCO2e), which consolidates the different global warming potentials (GWP) of each gas. The GWP accounts for the variable potency and atmospheric lifetime of each GHG emitted and converts this to the equivalent amount of carbon dioxide over a 100-year period.
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