some important for mike cox is the local forest world, and he's a frankly visit tough copy to share his expertise on issues like soil degradation. in the late 19th century, the area became a dumping ground for sewage from across the north of berlin, and remain safe over a 100 years young emanuel. there's still a certain amount of contamination from cadmium labs and compa ends english. so if you walk through these old sewage fields, you'll see completely barriers where there's not even gras square like them. but i think that's due to excessive sewage. although the most serious problem is water retention. capacity to say i'm so the trees and shrubs being planted here today need to be hard to go willows, european white homes, and check a trees, manage with relatively little water. some of them are treated to a quick boss before hand in a nutrient rich out the solution of the best in itself. so would not be enough to ensure a healthy stop for the saplings. difficult to the bottom of the why are we monitor our trees for 3 years? sometimes the gras squared is really high in the summer savanna