森林
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森林在任何樹木可以生長的地方出現，不管是屬哪一緯度。森林的樹木通常是不同的樹種，並有不同的高度。用生物学术语，森林也许从林地被区分：A forest has a more or less closed canopy, in which the branches and foliage of trees meet or interlock. A woodland has an open canopy, which allows some sunlight to penetrate between the trees (see also: savanna). 
很多种森林的存在，在生态学中的类型是： 森林通常被根据它们存在的生物群系来分类，并按照主要种类的树叶寿命(它们是否常青的或落叶的) 。Boreal forests occupy the subarctic zone and are generally evergreen and needle-leaved. Temperate zones support both deciduous forests (e.g., temperate deciduous forest) and evergreen forests (e.g., temperate rainforest, chaparral). Tropical and subtropical forests include tropical rainforest, tropical moist forest and tropical dry forest. The science of studying and managing forests, with a goal of sustainable extraction, is called forestry. Some ecologists also study forests. Forests can be damaged by logging, forest fires, and acid rain. In the United States, most forests have been destroyed at some point, though in recent years environmental protection has allowed for a comeback in many areas. In a number of places, forests have been allowed, for one reason or another, to grow back.
[编辑] 参见[编辑] 概要[编辑] 与森林有关的活动[编辑] 各国的森林[编辑] 列表[编辑] 世界森林砍伐情形
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