[k33l0r]

According to Wikipedia “the French Département du Déminage (Department of Mine Clearance) recovers about 900 tons of unexploded munitions every year”

https://en.wikipedia.org/wiki/Iron_harvest

[paulmd]

And, in the most heavily-impacted areas such as Verdun, they estimate that it will take not less than 700 years to clear the areas, at the present rate.