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Up to one fifth of the Amazon rainforest is emitting more CO2 than it absorbs, new research suggests. 最新研究表明，多达五分之一的亚马孙雨林排放的二氧化碳比吸收的还要多。 Results from a decade-long study of greenhouse gases over the Amazon basin appear to show around 20% of the total area has become a net source of carbon dioxide in the atmosphere. 对亚马孙流域温室气体的一项长达十年的研究结果显示，该流域中大约有20%的地区已成为大气中二氧化碳的净来源地。 One of the main causes is deforestation. 造成这一现象的主要原因之一是森林砍伐。 | 
