论文部分内容阅读
曾经覆盖地球一半森林已经消失,森林破坏在过去30年里不断加剧,这是位于华盛顿的世界观察研究所的最新报告的结
Forests that once covered half of the planet have disappeared and the destruction of forests has been aggravating for the past 30 years, the latest report of the Worldwatch Institute in Washington