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
考研
The planet is getting lusher, and we are responsible. Carbon dioxide generated by human activity is stimulating photosynthesis a
The planet is getting lusher, and we are responsible. Carbon dioxide generated by human activity is stimulating photosynthesis a
admin
2016-01-29
29
问题
The planet is getting lusher, and we are responsible. Carbon dioxide generated by human activity is stimulating photosynthesis and causing a beneficial greening of the Earth’s surface. For the first time, researchers claim to have shown that the increase in plant cover is due to this " CO
2
fertilisation effect" rather than other causes.【F1】
However, it remains unclear whether the effect can counter any negative consequences of global warming, such as the spread of deserts
.
Recent satellite studies have shown that the planet is harbouring more vegetation overall, but pinning down the cause has been difficult.【F2】
Factors such as higher temperatures, extra rainfall, and an increase in atmospheric CO
2
—which helps plants use water more efficiently—could all be boosting vegetation
.
To home in on the effect of CO
2
, Randall Donohue of Australia’s national research institute, the CSIRO in Canberra, monitored vegetation at the edges of deserts in Australia, southern Africa, the US Southwest, North Africa, the Middle East and central Asia.【F3】
These are regions where there is ample warmth and sunlight, but only just enough rainfall for vegetation to grow, so any change in plant cover must be the result of a change in rainfall patterns or CO
2
levels, or both.
If CO
2
levels were constant, then the amount of vegetation per unit of rainfall ought to be constant, too. However, the team found that this figure rose by 11 percent in these areas between 1982 and 2010, mirroring the rise in CO
2
. Donohue says this lends "strong support" to the idea that CO
2
fertilisation drove the greening.
Climate change studies have predicted that many dry areas will get drier and that some deserts will expand. Donohue’s findings make this less certain. However, the greening effect may not apply to the world’s driest regions. Beth Newingham of the University of Idaho, Moscow, recently published the result of a 10-year experiment involving a greenhouse set up in the Mojave desert of Nevada. She found "no sustained increase in biomass" when extra CO
2
was pumped into the greenhouse. "You cannot assume that all these deserts respond the same," she says. "Enough water needs to be present for the plants to respond at all. "
The extra plant growth could have knock-on effects on climate, Donohue says, by increasing rainfall, affecting river flows and changing the likelihood of wildfires.【F4】
It will also absorb more CO
2
from the air, potentially damping down global warming but also limiting the CO
2
fertilisation effect itself.
Donohue cannot yet say to what extent CO
2
fertilisation will affect vegetation in the coming decades.【F5】
But if it proves to be significant, the future may be much greener and more benevolent than many climate modellers predict.
【F4】
选项
答案
它还会从空气中吸收更多的二氧化碳,这可能会抑制全球变暖,但同时也会抑制“CO
2
施肥效应”。
解析
这是一个简单句。主语为It,谓语为will also absorb,宾语为more CO
2
。分词短语potentially damping down global warming but also limiting the CO
2
fertilisation effect itself作伴随状语。damp down意为“使失去精力(或劲头);阻止,遏制,抑制(感情、热情等);变少”,根据上下文,此处翻译为“抑制”。
转载请注明原文地址:https://kaotiyun.com/show/B0sZ777K
0
考研英语一
相关试题推荐
Parenthoodisn’tacareer-killer.Infact,economistswithtwoormorekidstendtoproducemoreresearch,notless,thantheir
Parenthoodisn’tacareer-killer.Infact,economistswithtwoormorekidstendtoproducemoreresearch,notless,thantheir
Parenthoodisn’tacareer-killer.Infact,economistswithtwoormorekidstendtoproducemoreresearch,notless,thantheir
【F1】Aonce-discardedideaabouthowlifestartedonourplanethasbeengivenanewlifeofitsown,thankstoanunexpectedfin
Oneofthebigger,nonpoliticalstoriesofthesummerhasbeenthedecisionbyLanceArmstrongtodrophisfighttoclearhisna
Cyberattacksseemtobegettingmoresophisticatedbythehour.Afewweeksagomal-wareknownasZeroDaywasfoundtohaveex
Youngpeopleoftenwonderatthelargenumberofemployerswhodonotrespondtotheirapplicationsforjobs.Theysaythatdesp
RuinsrecentlydiscoveredinsouthernPerucouldbetheancient"lostcity"ofPaititi,accordingtoclaimsthataredrawingser
Manywilldoubttobaccoindustryclaimsthatitissharpeningitssciencetoevaluate"healthiercigarettes".Butthat’swhatwi
随机试题
王丹可以向哪个法院起诉?为什么?判决之后,明富、明贵、王小兰在3个月内均未向王丹支付赡养费,王丹于是向法院提出了强制执行申请。法院正在积极进行执行工作,然而5天后的一个晚上,王丹想喝水从床上拿放在桌上的暖瓶时一头栽到地上,导致脑出血死亡。请问法院如何
正确定性统计违法案件的基础是()。[2013年初级真题]
主权债务危机产生的负面影响包括()。Ⅰ.导致新的贸易保护Ⅱ.危机国财政紧缩、税收增加Ⅲ.危机国货币贬值Ⅳ.危机国国债收益率上升
下列原始凭证中,属于企业自制原始凭证的是()。
在面试中,考官提问“如果公司派你出差,而这时你妻子病危,你怎么处理?”此类面试属于()
请阅读下列材料,并按要求作答。草虫的村落今天,我又躺在田野里,在无限的静谧中,忘了世界,也忘了自己。我目光追随着爬行的小虫,作了一次奇异的游历。
一袋10磅的新鲜土豆一般值2美元,而脱水的速食土豆平均每磅值3美元。可以得出结论,一些消费者为了方便愿意支付15倍的价格,因为这种方便食品的销量在持续增加。下面哪项,如果正确,指出了上面的论证有较大的缺陷?
使用______按钮可以实现对数据访问页的记录的浏览功能。
HowmuchdoesoneT-shirtcost?
German’sEducationSystem[A]Germanyinventedthemodernuniversitybutlongagolostitsleadingpositiontoothercountries,e
最新回复
(
0
)