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
2023-08-18
27
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protecttheir 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/2935885.html
相关试题推荐
Globalindustrializationhaspouredcarboninthesky,andnowwemustpayt
Globalindustrializationhaspouredcarboninthesky,andnowwemustpayt
Globalindustrializationhaspouredcarboninthesky,andnowwemustpayt
Globalindustrializationhaspouredcarboninthesky,andnowwemustpayt
Globalindustrializationhaspouredcarboninthesky,andnowwemustpayt
Globalindustrializationhaspouredcarboninthesky,andnowwemustpayt
[originaltext](23)Ifyoustopeatingmeat,yourfood-relatedcarbonfootpr
Rainforestsarecriticallyimportanttoourwell-being.Becausethey【B1】____
Rainforestsarecriticallyimportanttoourwell-being.Becausethey【B1】____
Rainforestsarecriticallyimportanttoourwell-being.Becausethey【B1】____
随机试题
[originaltext]W:Iwasshockedtohearofyourwife’sillness.Isshegoingto
Goodafternoon,folks.Today’sdiscussiontopicis"OnlineShopping".Witho
[originaltext]W:Excuseme.MywatchstoppedrunningandI’mnotsurewhat’s
下列关于吊篮使用的描述中,符合要求的是()。A.工作处阵风风速不大于8.5m/
内庭穴的主治是A.痰饮病证 B.妇科病证 C.五官热证 D.出血病
求助者中心疗法的实质是( )。多选A、个体人格的重建 B、重建个体在
A类电气装置和电力生产设施的下列金属部分,应接地的是()。A.不良导电地面的干
消防设计审查验收主管部门应当自受理消防设计审查申请之日起()内出具书面审查
下述关于非霍奇金淋巴瘤的特点中,错误的是A、非霍奇金淋巴瘤在淋巴瘤中发病率不高
已知某基础工程经过调整的双代号网络计划如下,其表达的正确信息有()。 A
最新回复
(
0
)