The exact extent of the damage is difficult to discern, because for many years records were not kept, but the estimates are that 75% of the world’s original forests have been logged or burned by humans. Some of them have grown back of course, or have been replanted, but it is thought that we now have only half of the amount of forest land we once had on this planet.
确切的破坏程度很难搞清楚，因为有许多年的记载没有被保存下来，但是据估计，世界上大约75%的原始森林遭到了人类的砍伐或焚烧。当然其中的一些又重新长了出来，或者被重新种上了树，但是普遍认为我们现在拥有的林地数目只有当初的一半左右。