昨天的森林——是人类赖以生存和发展的唯一资源;在农业时期森林仍然向人类提供一大部分食物、原料和牲畜饲料,在工业产生以后森林又为此提供燃料和原料。 今天的森林——正处在遭受种种破坏的时期,只有无能为力的生态学家在为森林呐喊。 明天的森林——林业将会复兴并将纳入现代社会体系中,有些国家已经意识到了这一趋势,并采取了一些行动。明天的森林是一种能提供多种原料(包括“绿色石油”)的宝贵资 Yesterday’s forest was the only resource on which mankind depends for survival and development. During agriculture, forests still provide mankind with a large portion of foodstuffs, feedstuffs and animal feedstuffs, and forests provide the fuel and raw materials for the industry after it is produced. Today’s forests - in the midst of all sorts of devastation - are only powerless ecologists crying out for the forest. Tomorrow’s Forests - Forestry will be revived and will be integrated into the modern social system. Some countries are aware of this trend and have taken some actions. Tomorrow’s forest is a valuable resource that offers a variety of ingredients, including “green oil.”