So there is a greater need for the prevention of even smaller roads after the trees have been chopped down.
當然，樹不是不能砍，而是要把「不砍，會損失多少」，拿來和「砍了，又損失多少」兩相權衡，再據以決定砍不砍、怎麼砍。不砍，確實有一些樹木會老化、腐爛，不用白不用；有的甚至產生病變，蔓延、影響了整個樹林。