A French environmental group has found artillery shells dating back to World Wars I and II and even the Franco-Prussian war of 1870 in a lake in eastern France. Water samples from Gerardmer in the Vosges mountains show high levels of TNT explosive as well as metals like iron, titanium and lead. A major theatre of conflicts over the past century and a half, France is particularly afflicted by unexploded ordnance, which results in 10 deaths nationwide a year.