A French environmental group has discovered artillery shells relationship again to World War II in a lake in japanese France with water samples displaying excessive ranges of TNT explosive, in addition to metals like iron, titanium and lead. A serious theatre of conflicts over the previous century, France is especially troubled by unexploded ordnance that leads to 10 deaths nationwide yearly.
https://www.france24.com/en/live-news/20240924-french-lake-still-riddled-with-bombs-80-years-after-world-war-ii