首页
登录
职称英语
Rainforests may store much less carbon than we thought. It could be time to
Rainforests may store much less carbon than we thought. It could be time to
游客
2023-08-15
40
管理
问题
Rainforests may store much less carbon than we thought. It could be time to dramatically revise our estimates following the discovery that apparently similar forests hold vastly different amounts of the stuff. The finding is important because there are plans for governments worldwide to compensate tropical countries for protecting their forests as "carbon sinks" to curb global warming. If carbon cannot be counted, then dollars cannot be disbursed (支付).
Greg Asner of the Carnegie Institution for Science in Stanford, California, and colleagues say they used satellite mapping, laser probing of forest undergrowth from aircraft and local ground surveys across a large area of Peruvian rainforest to crack the problem of estimating how much carbon is locked up in forests. But the new technique has revealed a large, previously unknown variability in the density of carbon stored in apparently similar forests.
The Intergovernmental Panel on Climate Change says that there should be about 587 million tonnes of carbon stored in the study area, 43,000 square kilometres of lowland forest in the Madre de Dios region of Peru. But after dividing the area into 40 million individual grid (格子) squares and estimating for each the carbon stored as well as the rate at which it is being fixed and released, Asner says the real figure is just 395 million tones, a third less. "What really surprised us was how carbon storage differed among forest types and the underlying geology," says Asner. For instance, where the underlying rocks are younger, the soils and forests contain more carbon. "There has been no way to uncover these incredible patterns till now."
The study also reveals major carbon loss due to logging, farming, mining and road construction—even in areas still covered by forest. This "forest degradation" made up almost 50 per cent of all carbon lost from the forest. But the study also found substantial carbon accumulated through natural forest regrowth on abandoned land.
Asner is now conducting similar studies elsewhere round the world, which he says can be used to police the United Nations’ proposed initiative on Reducing Emissions from Deforestation and Forest Degradation in Developing Countries. This scheme would compensate countries that protect their forests to store carbon. It’s important that countries with large rainforests do this, because around 15 per cent of global carbon dioxide emissions come from tropical deforestation.
Markku Kanninen, a forest scientist at the Center for International Forestry Research, a World Bank-backed body based in Bogor, Indonesia, agrees: "This research shows the importance of improving our data on forest carbon. The IPCC global default values are not precise enough for national inventories." [br] What is the result of the discovery that similar forests may hold different amounts of carbon?
选项
A、Forests can’t be used as "carbon sinks".
B、Carbon can’t be stored in rainforest.
C、Compensation can’t be distributed.
D、Global warming can’t be curbed.
答案
C
解析
题干是第1段第2句提到的内容,根据该段第3、4句表明的因果关系可推断,第2句提到的“相似的森林吸收的碳量存在很大差异”造成的结果就是第4句提到的“补偿金也就无法支付”。因此,本题应选C。
转载请注明原文地址:https://tihaiku.com/zcyy/2929481.html
相关试题推荐
Intheatmosphere,carbondioxideactsratherlikeaone-waymirror—theglas
Intheatmosphere,carbondioxideactsratherlikeaone-waymirror—theglas
Intheatmosphere,carbondioxideactsratherlikeaone-waymirror—theglas
Intheatmosphere,carbondioxideactsratherlikeaone-waymirror—theglas
Rainforestsmaystoremuchlesscarbonthanwethought.Itcouldbetimeto
Rainforestsmaystoremuchlesscarbonthanwethought.Itcouldbetimeto
Rainforestsmaystoremuchlesscarbonthanwethought.Itcouldbetimeto
Rainforestsmaystoremuchlesscarbonthanwethought.Itcouldbetimeto
SmallholderfarmersresettledtorainforestsbytheBraziliangovernmenthav
SmallholderfarmersresettledtorainforestsbytheBraziliangovernmenthav
随机试题
U.S.Early
【B1】[br]【B2】[audioFiles]audio_eusm_j01_350(20099)[/audioFiles]companies语意推断。此
静脉淤血对机体的影响取决于()。A.淤血的范围 B.淤血的器官 C.侧支
对严寒和寒冷地区居住建筑采暖计算的做法中,正确的是哪几项?A.建筑物耗热量指标由
下列哪项不是功能性前牙反的诊断标准A.下颌能后退至前牙对刃 B.近中磨牙关系
根据《个人信用信息基础数据库管理暂行办法》的规定,商业银行在( )时,才能查看
在波的传播方向上,有相距为3m的两质元,两者的相位差为,若波的周期为4s,则此波
关于工程建设其他费用,下列说法中正确的是()。A.建设单位管理费一般按建筑
初次接种麻疹疫苗的月龄是( )。A.8个月 B.10个月 C.12个月
信息管理指的是()的合理组织和控制。 A.信息传输 B.信息的
最新回复
(
0
)