The narrower Eco City planning area has already been cleaned up. To a large extent it is free of contamination, but there are remnants.
Regardless of the Wünsdorf site, cleaning up an area of munitions and contamination is an issue that is still crucial in many countries of the global south. It is precisely there, in crisis regions devastated by war and climate change, that the findings from Eco City are put into use. Therefore, part of the training is to make the area fertile and usable, as well as to remove munitions and contaminated sites free of hazards.
Technologies such as Terra Preta, which are used in the Eco City, are also capable of cleaning soil and making it fertile again.