https://www.conference-board.org/pdfdownload.cfm?masterProductID=43455
https://www.progressivepolicy.org/wp-content/uploads/2021/12/PPI_Natural-GasDec2021.pdf
https://www.gov.uk/government/speeches/farming-for-the-next-generation
https://www.brookings.edu/articles/making-emissions-count-in-country-classifications/