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- 许多世纪以来,森林被用作木材来源和获得农业用地的来源。对林地和森林资源管理不善,导致森林的状况正在迅速恶化。主要方面的状况有:工业木材的供应的严重短缺;随着山区森林的剥除,带来的灾难性的土壤侵蚀和洪水;许多发展中世界燃料木材严重短缺;沙漠在干旱和半干旱地区世界以惊人的速度在扩展;以及热带雨林的破坏造成的许多环境影响。
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