 This was in turn struck down by a referendum following the Fukushima nuclear accident.Deforestation, illegal building developments and poor land-management policies have led to significant erosion all over Italy's mountainous regions, leading to major ecological disasters like the 1963 Vajont Dam flood, the 1998 Sarno and 2009 Messina mudslides.Italy has the highest level of faunal biodiversity in Europe, with over 57,000 species recorded, representing more than a third of all European fauna.