首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
A recent study by German researchers presents the possibility of "carbon farming" as a less risky alternative to other carbon ca
A recent study by German researchers presents the possibility of "carbon farming" as a less risky alternative to other carbon ca
admin
2015-01-09
94
问题
A recent study by German researchers presents the possibility of "carbon farming" as a less risky alternative to other carbon capture and storage technologies. It suggests that a significant percentage of atmospheric CO
2
could potentially be removed by planting millions of acres of a hardy little shrub known as Jatropha curcas, or the Barbados nut, in dry, coastal areas. But other experts raised doubts about the study’s ambitious projections, questioning whether the Barbados nut would be able to grow well in sandy desert soils and absorb the quantity of carbon their models predict.
The researchers behind the study say Barbados nut plantations could help to mitigate the local effects of global warming in desert areas, causing a decrease in average temperature and an increase in precipitation. If a large enough portion of the Earth were blanketed with carbon farms, they say, these local effects could become global, capturing between 17 and 25 metric tons of CO
2
per hectare each year over a 20-year period. The study, published in the journal Earth System Dynamics, states that if 730 million hectares of land—an area about three-quarters the size of the United States—were devoted to this method of carbon farming, the current trend of rising atmospheric CO
2
levels could be halted.
Carbon farms would not compete with food production if they were concentrated in dry coastal areas, the researchers said. In their scenario, oceanside desalination plants, partially powered by biomass harvested from the plantations themselves, provide a low-emissions irrigation method. The study states that the Barbados nut is uniquely suited to growing in regions inhospitable to other crops. The plant, which produces a nonedible seed that can be used to create biodiesel, is comfortable growing at temperatures exceeding 100 degrees Fahrenheit. It can also withstand high levels of contamination in the soil, making wastewater another potential source for irrigation.
The cost of carbon farming is comparable to the costs associated with other carbon capture and storage technologies, the study asserts. The researchers calculated that the total cost for a plantation would be between 42 and 63 per ton of carbon, or between about $ 55 and $ 85. The estimated cost of carbon capture technology varies widely, but the nonprofit Center for Climate and Energy Solutions pegs it between $36 and $81, depending on the emissions source. Wulfmeyer stressed that carbon farming could have "fantastic value for the local people" if international carbon markets pick up, promoting rural development and opening up the possibility of additional agriculture as the soil quality improves around the plantation.
In an email, van Noordwijk, chief science adviser for the World Agroforestry Center in Bogor, Indonesia, questioned the growth rate and the atmospheric carbon capture rate hypothesized by the study’s authors, calling the estimated carbon price of the plantations a "substantial underestimate." "We’re not talking about trees that create substantive, high-density woody biomass, but about a plant with a shrubby growth habit and a long track record of deceiving farmers with yield potentials that are not being realized," he said. Also, van Noordwijk said, "even with the abundance of water, the nutrient storage in sandy desert soil is low, and bringing in the nutrient supply to support high growth rates has high energy costs if nitrogenous fertilizer is used." He added, "The estimated carbon price of this option already indicates that there are far better opportunities for reducing ongoing emissions from peatland use and deforestation."
What do some experts worry about the Barbados nut according to the passage?
选项
A、Its ability to grow well and absorb carbon.
B、The high cost and low production.
C、The high temperature in the surroundings.
D、Its ability to create biodiesel.
答案
A
解析
细节题。由题干定位至第一段。由该段最后一句“But other experts…questioning whether theBarbados nut would be able to grow well in sandy desert soils and absorb the quantity of carbon their modelspredict.”可知,其他一些专家质疑桐油树是否能够生长在恶劣的土壤环境中以及它是否能够像预期的那样吸收足量的碳排放物。因此[A]正确。
转载请注明原文地址:https://kaotiyun.com/show/FydO777K
0
专业英语八级
相关试题推荐
Britain’sexcitablepresssometimesgetsintoaflapoveroddissues.OnerecentexampleistheDailyTelegraph,Britain’sbest-
_____isthefirstAmericanblackwomanwriterwhowontheNobelPrizeforLiterature.
Askedwhatjobtheywouldtakeiftheycouldhaveany,peopleunleashtheirimaginationsanddreamofexoticplaces,powerfulpo
AccordingtoEllen,theincreasingdemandforhiringisdueto
AccordingtoEllen,theincreasingdemandforhiringisdueto
CharacteristicsofAmericanCultureI.PunctualityA.Goingtothetheaterbe(1)_____twentyminutesprior(1)______B.Eate
AccordingtoarecentregulationissuedbytheMinistryofHealth,smokingwillbebannedinallenclosedpubliclocationsinCh
ThenovelwritingoftheRomanticPeriodwasrepresentedbyWalterScottand______.
UltimoVargashadbeeninHatch,NewMexico,onlysixmonths,sinceMarch,andalreadyheownedhisownbusinesstocompetewith
TheimmigrantscomingtoBritainaremainlyfrom______.
随机试题
胎盘分泌的激素有
自发性气胸的治疗要点是
某区法院判决撤销某区公安局的处罚决定,返还当事人甲2000元罚款,要求在判决生效后15日内执行。后当事人均未上诉,区公安分局也未返还罚款。对区公安分局不履行法院判决,法院可以采取的执行措施有:()
关于联合体投标,下列说法正确的是()。
依照《合同法》的有关规定,居间人未促成合同成立,但发生了一定的费用,居间人可以要求()。
甲公司2×19年度发生的有关交易或事项如下:(1)1月1日,与乙公司签订股权转让协议,以发行权益性证券方式取得乙公司80%的股权,作为长期股权投资核算。购买日,甲公司所发行权益性证券的公允价值为12000万元,乙公司可辨认净资产账面价值为13000万
哥白尼的“太阳中心说”并非真正科学,但他的巨大进步意义在于()。
恢复国内保险业务后,最早成立的保险公司是()。
某市在第五次人口普查显示。该市老年人口老龄化(65岁以上)比率为14.7%。现随机调查了400名当地市民,则其老龄化率为10%和16%之间的概率为多少?
[*]
最新回复
(
0
)