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
2015-05-24
67
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."
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
细节题。由题干定位至第三段。南该段第四、五句“The plant,which produces a nonedible seed thatcan 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 sourcefor irrigation.”可知,在该段提到的桐油树的不同特点中,只有选项[B]“可以食用的种子”与文中不符,故选[B]。
转载请注明原文地址:https://kaotiyun.com/show/qROO777K
0
专业英语八级
相关试题推荐
A、Germany.B、Switzerland.C、Spain.D、France.D
中国民族自古以来从不把人看做高于一切,在哲学文艺方面的表现都反映出人在自然界中与万物占着一个比例较为恰当的地位,而非绝对统治万物的主宰。因此我们的苦闷,基本上比西方人为少为小;因为苦闷的强弱原是随欲望与野心的大小而转移的。农业社会的人比工业社会的人享受差得
Whichofthefollowingiscorrectconcerninglangueandparole?
ThomasMalthuspublishedhisEssayonthePrincipleofPopulationalmost200yearsago.Eversincethen,forecastershavebeing
大自然对人的恩赐,无论贫富,一律平等。所以人们对于大自然,全都一致并深深地依赖着。尤其在乡间,上千年来人们一直以不变的方式生活着。种植庄稼和葡萄,酿酒和饮酒,喂牛和挤奶,锄草和栽花;在周末去教堂祈祷和做礼拜,在节日到广场拉琴、跳舞和唱歌;往日的田园依旧是今
TheCongressoftheUnitedStatesiscomposedoftwoparts,namely,______,enjoyingatwo-yearterm,and______,asix-yearter
A、Theprettydivineplace.B、Itswonderfulpast.C、Fantasticbirdsandreptiles.D、Agreatnumberoftemples.B
"Andshetiedabunchofvioletswithatressofherprettybrownhair."Shesatintheyellowglowofthelamplightsoftly
In1774,theFirstContinentalCongressmetin______.
______isananti-slaverynoveland"helpedlaythegroundworkfortheCivilWar".
随机试题
两税法的提出者是()
女性,26岁。体检发现白细胞减少。下列哪项药物不会引起白细胞减少
下列哪项属于高危家庭
黏合剂
城镇地区城区地籍图的比例尺一般采用()。
如果飞机沿正确进近航道进场,驾驶员将看到PAPI灯的颜色为()。
元曲四大家之一的()以其华彩大作《窦娥冤》为代表,为元杂剧奠基人。
“成熟势力说”强调________对人的身心发展的决定作用。
造成故障1的原因是什么?如何解决?1.将故障2中(1)和(2)两处合适的答案填入答题纸相应的解答栏内。2.故障2如何解决?
HTTP协议中,用于读取一个网页的操作方法为(68)。
最新回复
(
0
)