1. European Commission (2019). The European Green Deal: COM(2019) 640 Final, European Commission.
2. United Nations (2015). Framework Convention on Climate Change. The Paris Agreement, United Nations.
3. European Commission (2020). A Hydrogen Strategy for A Climate-Neutral Europe: COM(2020) 301 Final, European Commission.
4. European Commission (2021). ‘Fit for 55′: Delivering the EU’s 2030 Climate Target on the Way to Climate Neutrality: COM(2021) 550 Final, European Commission.
5. European Commission (2022). REPowerEU Plan: COM(2022) 230 Final, European Commission.