https://www.esri.ie/sites/default/files/media/file-uploads/2020-01/Slides_1.pdf
https://www.bruegel.org/wp-content/uploads/2021/05/PC-2021-11-ecofin-210521.pdf
https://www.eurofound.europa.eu/sites/default/files/ef_publication/field_ef_document/ef1729en.pdf
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