目前,世界已进入昂贵的能源时期,地球上比较廉价的能源资源与年俱减。对世界动力技术具有重要意义的大油田很快即将枯竭,人们不得不开发小块油田和高粘滞油田,或者到海水下几百米的大陆架去开发。因此,能源问题,已成为世界上一个紧迫的重要问题。解决此问题,除了有效地开发和利用现有四大能源外,还在大力探索和开发各种新能源,如:太阳能、风能、地热等。与此同时森林能源也引起了各国的注意和重视。森林能源具有再生能力强,污染程度小的特点,森林的生长过程,是利用太阳能将CO_2和水分转换成纤维素和 At present, the world has entered an era of expensive energy, and the cheaper sources of energy on Earth are decreasing year by year. Large oil fields important to the world of power technology are soon to dry up, and people have to develop small and highly viscous oil fields or go to the continental shelf a few hundred meters below sea level. Therefore, the energy issue has become an urgent and important issue in the world. To solve this problem, in addition to effectively developing and utilizing the four existing energy sources, we are also vigorously exploring and developing various new energy sources such as solar energy, wind energy and geothermal energy. At the same time, forest energy has also drawn the attention of all countries. Forest energy has a strong ability of regeneration, pollution is small, the growth process of the forest is the use of solar energy to CO_2 and moisture into cellulose and