https://aclanthology.org/2021.acl-long.4.pdf
https://www.etui.org/content/download/35697/354977/file/18+Social+policy+in+EU+2018+OSE+Web+version.pdf
https://thebreakthrough.org/issues/energy/sins-of-a-solar-empire
http://documents.worldbank.org/curated/en/356091537360897955/pdf/WPS8588.pdf