森林不仅仅具有提供木材和林产品的功能，而且也为人类提供良好的生态环境。它在涵养水源、改良土壤、防止水土流失、防灾减灾、调节气候和保护生物多样性等诸多方面起着极其重要的作用。党的十五届三中全会明确提出了加强天然林保护工作，天然林保护工程正式启动，为我国林业? Forests not only provide the function of providing wood and forest products, but also provide a good ecological environment for human beings. It plays an extremely important role in conserving water resources, improving soil, preventing soil erosion, preventing and reducing disasters, regulating climate and protecting biodiversity. The Third Plenary Session of the 15th CPC Central Committee clearly proposed strengthening the protection of natural forests, and officially started the protection of natural forests for China’s forestry?