https://www.progressivepolicy.org/wp-content/uploads/2021/12/PPI_Natural-GasDec2021.pdf
https://www.tandfonline.com/doi/full/10.1080/14693062.2024.2341080
https://www.esri.ie/system/files/publications/SUSTAT120.pdf
https://www.gov.uk/government/publications/uk-reach-approach-to-including-substances-of-very-high-concern-on-the-candidate-list/approach-to-including-substances-of-very-high-concern-on-the-uk-reach-candidate-list