论文部分内容阅读
联合国估计,全球每年有近1300万公顷(约合3200万英亩)森林被砍伐,相当于希腊或尼加拉瓜的国土面积。砍伐森林对环境造成以下影响:气候变化:树木通过光合作用吸收二氧化碳,并将碳贮存于枝干和根部。据
The United Nations estimates that nearly 13 million hectares (about 32 million acres) of forest are cut down each year, which is equivalent to the land area of Greece or Nicaragua. Deforestation has the following impacts on the environment: Climate change: Trees absorb carbon dioxide through photosynthesis and store carbon in branches and roots. according to