https://www.bwb.gv.at/fileadmin/user_upload/Abschlussbericht_BU_Kraftstoffe_2022_final_barrierefrei.pdf
https://www.omfif.org/analysis/commentary/2017/june/uk-risks-falling-behind-europe/
https://www.eia.gov/energyexplained/us-energy-facts/imports-and-exports.php