Lee explains that trees do not become useless just because they have died. Nature replaces the old with the new by itself. Cutting down dead trees and removing them to preserve a forest's appearance often upsets the natural balance, creating an "unnatural" uniformity.
森林自己會新陳代謝，因此林地上以人工砍伐枯樹、移走倒木來維持林相，常常因此破壞了水土，讓生態環境變得單調乏味。