https://www.theguardian.com/world/2023/sep/21/italy-po-valley-blighted-air-pollution-worst-europe
https://ec.europa.eu/competition/publications/reports/kd0419345enn.pdf
https://www.esri.ie/system/files/publications/RB202025.pdf
https://ec.europa.eu/transparency/documents-register/detail?ref=C(2022)6536&lang=en