Our site was planted with poplar trees some 30 years ago. Every year, we plant hundreds of extra trees and schrubs to get a more diverse site, and also to have some trees available for when the original poplars all have died.
We regularly have to remove some trees when the're bad and therefore dangerous. Should you want to help, ask the warden. Not every scout has the opportunity to chop down a big tree !
More information, please ask Jaap van der Toorn.