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
64
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
WhatsuggestiondoesMs.LiongivetothestudentsusingInternetasaninformationsource?
WhichofthefollowingisTRUEofthepeoplesufferingfromtheaccident?
FiveCommonMistakesinConversationsandTheirSolutionsI.NotlisteningA.Problem:mostpeopledon’tlisten—waiteagerlyf
CharacteristicsofAmericanCultureI.PunctualityA.Goingtothetheaterbe(1)_____twentyminutesprior(1)______B.Eate
CharacteristicsofAmericanCultureI.PunctualityA.Goingtothetheaterbe(1)_____twentyminutesprior(1)______B.Eate
Asmanyenvironmentalissuesarethreateningourhealthandlife,wefeelitimportanttoleadaneco-friendlylifetoprotectt
Asisreportedinthepressinrecentyears,moreandmoreprivatecarsarerunningonthecityroadsandthetrafficjamsareg
IntheUnitedKingdom,eachmemberofParliamentrepresentsa______,andholdshisseatduringthelifeofaparliament.
UltimoVargashadbeeninHatch,NewMexico,onlysixmonths,sinceMarch,andalreadyheownedhisownbusinesstocompetewith
ForadevelopingcountrylikeIndiawhoseecologicalandsocio-economicsystemsarealreadyunderpressurefromrapidurbaniza
随机试题
5岁,呕吐腹泻10h。突然脐周阵发性腹痛。恶心呕吐3次~4次,大便5次~6次,初为蛋花汤样后呈赤豆汤血水便,腥臭、无脓,腹胀,T:39℃,腹软。不固定压痛,未及包块患儿最可能的诊断是()
超声波检测是检验焊缝内部缺陷的一种准确而可靠的方法,它可以显示出缺陷的种类、形状和大小,并可作永久的记录。
某企业着手编制2007年6月份的现金收支计划,预计2007年6月初现金余额为8000元:月初应收账款4000元,预计月内可收回80%;本月销货50000元,预计月内销售的收款比例为50%;本月需要采购材料的成本为8000元,企业每月采购金额中70%当月付清
某有限责任公司监事在执行公司职务时违反公司章程,给公司造成了损失。该公司设立董事会,对于要求该监事赔偿公司的诉讼,下列表述正确的有()。
小赵(女)和小田(男)于2010年登记结婚。2012年,小赵父亲因病去世,在其生前所立遗嘱中,指定由小赵继承一辆小轿车和五万元,则()。
某客轮以同一速度往返于两码头之间。它顺流而下,行了8小时,逆流而上,行了10小时,如果水流速度是每小时3千米,则两码头之间的距离是:
下列关于急性根尖周炎发展过程描述哪些是正确()。
下列说法正确的是()。
简述马克思主义在中国传播的过程。
Whatistheconversationmainlyabout?
最新回复
(
0
)