At the moment, the methodology description only includes a short summary of the calculations. All data sources should be added to it. Also make sure to add the data sources of the hard-coded parameters in the histogram calculations: - mean residential CO2 emissions per capita in Germany (2.2 t): https://www.umweltbundesamt.de/bild/durchschnittlicher-co2-fussabdruck-pro-kopf-in - mean heating energy consumption in Germany (127.1 kWh/m²): https://www.wohngebaeude.info/daten/#/heizen/bundesweit