Calculating greenhouse gas emissions is a multi-step process
We are continuously updating our calculation models.
Climate science and data reporting are in rapid and constant development . Therefore, we continuously update our calculation methods based on the latest available knowledge.
When we calculate greenhouse gas emissions, we include all of the gases which the IPCC classifies as greenhouse gases. Some of the gases have a larger impact than others, so we convert them to a single value for their climate impact: carbon dioxide equivalents (CO2e). This makes emissions of different greenhouse gases comparable.