https://wwfeu.awsassets.panda.org/downloads/ets_revenues_report_2022___web___final.pdf
http://www.resolutionfoundation.org/app/uploads/2017/01/Audit-2017.pdf
https://www.socialeurope.eu/the-german-debt-brake-reform-urgent
https://www.ft.com/content/bcebd77c-057b-4fd0-bd99-b97e0e559455