世界森林资源正以前所未有的速度减少。“森林在消亡”,科学家们向人类发出警告。从80年代末以来,对森林资源的乱砍滥伐正日益引起人们的重视。但是,森林资源遭到的破坏究竟到了何种程度,森林资源消失的速度如何。有关人士所作的估计却大相径庭。如1988年,巴西国家航天研究所的阿尔贝托·塞策,利用美国一颗气象卫星上的红外传感器对亚马孙河流域热带雨林破坏程度所进行的评估认为,1887年亚马孙河流域森林开垦面积达800万公顷,占该流域林区总面积的近2.2％。虽然当时就有人对这个数字提出异议,但许多研究世界森林问题的报告都引用了这一数字。尤其是设在美国首都华盛顿的世界资 The world’s forest resources are declining at an unprecedented rate. “The forest is dying,” scientists warn humans. Since the late 1980s, the deforestation of forest resources is gaining more and more attention. However, to what extent forest resources have been destroyed and how quickly have forest resources disappeared? The estimates made by the parties concerned are very different. For example, Alberto Setze of the National Institute of Aeronautics and Astronautics of Brazil in 1988 evaluated the degree of tropical rainforest destruction in the Amazon Basin using infrared sensors on a US meteorological satellite. In 1887, the area of ​​reclamation in the Amazon basin amounted to 8 million hectares, accounting for nearly 2.2% of the total forest area in the basin. Although some objected to this figure at that time, many of the reports on the world’s forests have quoted this figure. Especially in the capital of Washington, the capital of the United States