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 c
A recent study by German researchers presents the possibility of " carbon farming" as a less risky alternative to other carbon c
admin
2016-06-30
38
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-emission 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 non-edible 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. "
Which of the following characteristics does NOT belong to the Barbados nut?
选项
A、High temperature resistant.
B、The edible seed.
C、Adaptability to dirty water.
D、Biological sources of energy.
答案
B
解析
事实细节题。由题干中的characteristics和Barbados nut定位至第三段。由该段最后两句Theplant,which produces a non—edible seed that can be used to create biodiesel,is comfortablegrowing at temperatures exceeding 100 degrees Fahrenheit.It can also withstand high levels ofcontamination in the soil,making wastewater another potential source for irrigation.可知,在该段提到的桐油树的不同特点中,只有[B]“可以食用的种子”与文意不符,故选[B]。[A]“耐高温的”,文中is comfortable growing at temperatures exceeding 100 degrees Fahrenheit正说明了这一点,故排除;[C]“对脏水的适应性”,文中It can also withstand high levels of contaminationin the soil…说明它能够承受土壤中高度污染的水,故排除;[D]“能源的生物来源”,文中which produces a nonedible seed that can be used to create biodiesel是说其种子可以用来生产生物柴油,故排除。
转载请注明原文地址:https://jikaoti.com/ti/iyFYFFFM
0
专业英语八级
相关试题推荐
Thetranslatormusthaveanexcellent,up-to-dateknowledgeofhissourcelanguages,fullfacilityinthehandlingofhistarget
TheBritishIslesareseparatedfromtheEuropecontinentby______inthesouth.
Doyourememberallthoseyearswhenscientistsarguedthatsmokingwouldkillusbutthedoubtersinsistedthatwedidn’tkno
Inlessthanthreedecades"multiculturalism"hasbecomeawordimmediatelyrecognizablebypolicy【M1】______makers,socialcri
ThefirstAmericanleaderwhosuggestedcreatingasystemoffreeschoolsforallpersonsthatwouldbepubliclysupportedthrou
WhichdegreeisofferedincommunitycollegesintheUnitedStates?
Cross-culturalLivingInadaptingtoanewculture,expecttogothroughthreedistinctstages.Iwillgiveyousomeideas
Cross-culturalLivingInadaptingtoanewculture,expecttogothroughthreedistinctstages.Iwillgiveyousomeideas
Iwasonly8yearsoldonJuly20,1969,whenNeilArmstrong,38-year-oldcommanderofApollo11,descendedthecrampedlunarmo
(1)WHYSHOULDanyonebuythelatestvolumeintheever-expandingDictionaryofNationalBiography?Idonotmeanthatitisbad,
随机试题
治疗关节疼痛,痛无定处,时见恶风发热,舌淡苔薄白,脉浮。宜选取()
洋地黄中毒最常见的心律失常是()。
角焊缝“A”的长度是( )。承托角钢采用140×90×10,l=160mm,短肢切成30mm宽,长肢焊在柱翼缘上,角焊缝尺寸为8mm,侧焊缝与底焊缝连续施焊不切断,承托焊缝考虑不均匀系数1.3,( )。
某轧钢棒(线)材厂施工项目。电源、水源及加热炉用燃气气源已送到建设红线外1m,厂区道路已通。主要设施有主厂房、电气室、主轧线设备,辅助设备有:水处理设施、容压站、机修间、轧钢生产线设备布置在+5m平台上,平台下设置液压润滑站,电缆桥架及水管、油管等。施工进
掌握客户的纳税状况是理财规划师进行税收筹划中的必要环节,个人所得税是个人理财中一个非常重要的税种。个人所得税主要是对个人(自然人)取得各项应税所得课征的一种税。其纳税义务人包括中国公民、个体工商户以及在中国有所得的外籍人员和港澳台同胞。我国的个人所得税共有
期货公司应当设立(),对期货公司经营管理行为的合法合规性进行审查、稽核。
企业为了筹措短期资金,在货币市场上发行在将来一定时期内偿付本息的凭证,这种凭证称为()。
材料:小杨在数学课上的表现一直不佳。当老师在课上布置练习题的时候,发现小杨对应用题的理解毫无进展。“加油,小杨。我知道你能做出这道题的。”老师在小杨耳边低语,“好好花上几分钟仔细阅读题目,然后把题目分解成几部分,等一下我会过来看看你做得怎么样。”几分
在动态转储中,利用转储文件只能将数据库恢复到转储过程中的某个状态,且转储文件中的数据可能不一致,只有和【12】文件综合起来使用,才能将数据库恢复到一致状态。
FranceintheTwentiethCenturyI.FranceinWorldWarI1914:GermanydeclaredwaronFranceand【T1】______【T1】______Th
最新回复
(
0
)