PSE's carbon footprint calculations were performed in accordance with the international GHG Protocol Corporate Accounting and Reporting Standard. We used 2017 as our baseline year – the year for which we calculated greenhouse gas emissions for the first time and against which we compare emissions in the following years.
In this year's calculations, we have decided to extend the analysis of the volume of greenhouse gas emissions resulting from our activities to include further categories related to our value chain (scope 3). Compared to the previous year, this year's calculations have also included emissions from the production and distribution of the fuels and energy used (the so-called Well-to-Tank emissions) and the production and losses arising from the transmission of electricity returned from the grid to end users. We have also calculated emissions associated with the management of the waste we generate. We have also included these aspects in the results for 2017-2020 by way of recalculation in order to maintain comparability of results and consistency in the methodology used. We aim to broaden our view of our company's climate impact and more accurately identify opportunities for action that PSE can take to reduce this impact.