For example, there may be more forest in 2100 than there is today, but much of that will be newly planted forest, which is ecologically different (and less biodiverse) than old forest.

• 举例来说，到了2100年，世上的森林面积或许比今天还大，但是其中大多数都是新种植的，在生态条件上必定与古老森林不同（生物多样性比较低）。