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
2024-04-26
44
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] According to the fifth paragraph, it’s important that countries with large rainforests should __.
选项
A、be provided with valid data on forest carbon
B、reduce carbon emission from stopping deforestation
C、carry out the compensation scheme
D、conduct studies on carbon emission
答案
B
解析
要回答本题,必须找到第5段最后一句中this的所指。结合上一句内容可知,this指的应该是protect their forests to store carbon。在该段最后一句又提到,毁林导致二氧化碳排放增加。由此判断,停止毁林能够减少二氧化碳增加。本题应选B。
转载请注明原文地址:https://tihaiku.com/zcyy/3571714.html
相关试题推荐
Low-carbonbecomesahigh-frequentandfashionablewordwhichgetsthegreat
Low-carbonbecomesahigh-frequentandfashionablewordwhichgetsthegreat
Low-carbonbecomesahigh-frequentandfashionablewordwhichgetsthegreat
Low-carbonbecomesahigh-frequentandfashionablewordwhichgetsthegreat
Rainforestsmaystoremuchlesscarbonthanwethought.Itcouldbetimeto
Rainforestsmaystoremuchlesscarbonthanwethought.Itcouldbetimeto
Rainforestsmaystoremuchlesscarbonthanwethought.Itcouldbetimeto
Children’sideasabouttherainforestsandtheimplicationforcoursed
Children’sideasabouttherainforestsandtheimplicationforcoursed
Children’sideasabouttherainforestsandtheimplicationforcoursed
随机试题
Fruitisrich______vitamins.A、withB、inC、atD、ofBberichin是固定搭配,“富含…”。句意为:水果富
Scientistsaroundtheworldareracingtolearnhowtorapidlydiagnose,tre
某居住区内的绿地具备下列四项条件:(1)一侧紧邻居住区道路并设有主要出入口(2)
天津某商场的排风系统拟采用显热热回收装置,设计选用时,下列哪几项额定热回收效率是
阅读说明和流程图,填补流程图中的空缺(1)?(5),将答案填入答题纸对应栏内。【
关于声束聚焦与分辨力的叙述,下列正确的是A.聚焦声束后其形状和大小比较规则 B
GB/T22080-2016《信息技术安全技术信息安全管理体系要求》标准规定
(2021年上半年真题)在许多人起哄的时候,平时文静的学生也往往会参与其中。这种
关于国有土地,下列哪些说法是正确的?()(2010年)A.国有土地可以是建设用
某公司向银行借入12000元,借款期为3年,每年的还本付息额为4600元,已知(
最新回复
(
0
)