The whole area was full of unexploded shells (including many gas shells), grenades, and rusty ammunition. Soils were heavily polluted by lead, mercury, chlorine, arsenic, various dangerous gases, acids, and human and animal remains.[1] The area was also littered by ammunition depots and chemical plants.
Each year dozens of tons of unexploded shells are recovered and, according to the Sécurité Civile agency in charge, at the current rate no fewer than 700 more years will be needed to completely clean the area. Some experiments conducted in 2005–06 discovered up to 300 shells/10,000 m² in the top 15 cm of soil in the worst areas.[1]
Some areas remain off limits (for example two small pieces of land close to Ypres and Woëvre) where 99% of all plants still die as arsenic can amount up to 17% of some soil samples (Bausinger, Bonnaire, and Preuß, 2007).