1. (2023, December 02). Bundesministerium für Justiz (German Federal Ministry of Justice): Bundes-Klimaschutzgesetz (Federal Climate Protection Law) from 12 December 2019 (BGBl. I S. 2513), Changed by Article 1 of the Law from 18 August 2021 (BGBl. I S. 3905). (In German).
2. European Commission (2023, October 30). Stepping Up Europe’s 2030 Climate Ambition—Investing in a Climate-Neutral Future for the Benefit of Our People. Available online: https://eur-lex.europa.eu/legal-content/EN/TXT/PDF/?uri=CELEX:52020DC0562&from=EN.
3. Umweltbundesamt (2023, October 31). Daten der Treibhausgasemissionen des Jahres 2022 nach KSG. (In German).
4. Umweltbundesamt (2023, October 31). Berechnung der Treibhausgasemissionsdaten für das Jahr 2021 gemäß Bundesklimaschutzgesetz. (In German).
5. European Parliament (2023, October 30). 70% of Jet Fuels at EU Airports Will Have to Be Green by 2050. Available online: https://www.europarl.europa.eu/news/en/press-room/20230911IPR04913/70-of-jet-fuels-at-eu-airports-will-have-to-be-green-by-2050.