论文部分内容阅读
森林是宝贵财富,是可更新的资源,它能满足人类各方面的需要。人们根据森林的起源,将其划分为原始林、天然林和人工林,亦可称为世界第一森林、第二森林和第三森林。一、世界第一森林——原始森林世界第一森林即原始森林,其残骸经几百万年地表结构之变化,受到腐蚀后变成碳氢化合物而保存下来,成为今天人类赖以生存的物质。这种森林,以煤的形式曾供给了十八、十九世纪工业革命之燃料,以石油形式维持现代工业、发电、农业和运输系统,成为人类生活的主要能源。二、世界第二森林——天然林
Forests are valuable assets, renewable resources that meet the needs of humankind in all its aspects. According to the origin of the forest, people divide it into primary forest, natural forest and plantation forest. They can also be referred to as the world’s first forest, the second forest and the third forest. First, the world’s first forest - virgin forest The world’s first forest that virgin forest, the wreck of millions of years by changes in surface structure, corroded and then become hydrocarbons and preserved, as today’s human survival of the material . This kind of forest, which was supplied with coal in the form of fuel for the eighteenth and nineteenth centuries, has become the main source of energy for human life by maintaining modern industrial systems, power generation, agriculture and transportation systems in the form of oil. Second, the world’s second forest - natural forest