论文部分内容阅读
森林是一种很珍贵的自然财富,是“建设社会主义所需要的重要因素”,又是人类改造自然,保护环境的强大武器。森林对于人类主要有两个方面的作用。一个是物质上的,一个是生态上的。森林的物质作用,主要表现为提供木材和林付产品。我们要搞建设,任何部门都离不开木材。例如,建筑每一千平方米砖木结构的房屋,约需100—130立方米木材;铺设一公里的铁路,约需300立方米木材作枕木;开采一万吨煤炭,约需250立方米坑木,等等。至于以木材为主要原料的木材加工工业,造纸工业和木材化学工业,更是离不开木材。森林还是一种能源。据估计全世界约有15亿人主要靠烧柴做饭、取暖,每
The forest is a precious natural wealth, an “important factor needed in building socialism” and a powerful weapon for mankind to transform nature and protect the environment. Forests have two main functions for human beings. One is material, one is ecological. The material role of forests is mainly manifested in providing wood and forest products. We want to engage in construction, and no department can not do without the wood. For example, it takes about 100-130 cubic meters of timber for every 1,000 square meters of brick-wood houses and about 300 cubic meters of timber for laying one kilometer of railroad. Tons of tons of coal are mined and about 250 cubic meters of pit Wood, and so on. As for the timber as the main raw material processing industry, the paper industry and the chemical industry of wood, it is inseparable from the wood. Forest is also an energy source. It is estimated that about 1.5 billion people around the world mainly rely on cooking firewood, heating, each