1. The European climate law;European Commission,2021
2. FACT SHEET: President biden to catalyze global climate action through the major economies forum on energy and climate;The White House,2023
3. An Energy Sector Roadmap to Carbon Neutrality in China – Analysis;IEA,2021
4. Problematic corporate purchases of clean energy credits threaten net zero goals;S&P Global,2021
5. How iceland sold the same green electricity twice;Böck,2023