https://counter-balance.org/uploads/files/ECA_report.pdf
https://blogs.lse.ac.uk/europpblog/2022/11/07/on-the-meaning-of-sustainability/
https://www.emcdda.europa.eu/publications/html/pods/waste-water-analysis_en
https://www.energycharter.org/fileadmin/DocumentsMedia/CCDECS/2019/CCDEC201908.pdf