“… historical sites (e.g. iron mining in Rancourt, Lorraine, France [43], coal mining in Witbank Coalfields, South Africa [32], Athens Basin [51], South Limburg, Netherlands [50], closed mines in the 1990s (e.g.Inowroclaw, Poland [47], South Derbyshire and Leicestershire, UK [62], Nord/Pas-e-Calais, France [25], Ocnele Mari, Romania [35], Campine Coal Basin, Belgium [16]), closed mines after 2000 (e.g. salt mine in Poland [11][12][13]), active mining sites (e.g.…”