And finally, at the ecosystem level, whether it's flood prevention or drought control provided by the forests, or whether it is the ability of poor farmers to go out and gather leaf litter for their cattle and goats, or whether it's the ability of their wives to go and collect fuel wood from the forest, it is actually the poor who depend most on these ecosystem services.
健康问题。 最后，从生态系统层面看， 无论是从森林提供的防洪抗旱功能来说， 从并不富裕的农民们 到森林中为他们的牛羊 搜集枯树叶作为饲料来说， 还是从农妇们外出到森林中 搜集用于烤火的木头来说， 穷人们实际上更加依赖于 生态系统所提供的资源。