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
Planting trees might not be such a good idea in the fight against global warming—least not in high latitudes (纬度). That’s the im
Planting trees might not be such a good idea in the fight against global warming—least not in high latitudes (纬度). That’s the im
admin
2009-04-23
72
问题
Planting trees might not be such a good idea in the fight against global warming—least not in high latitudes (纬度). That’s the implication of new research that finds that forests in parts of Canada, Siberia, and Scandinavia could absorb enough sunlight to warm those areas some 10 degrees Fahrenheit (5.5 degree Celsius) over the next century compared to if those forests don’t exist. They run counter to long-standing arguments that planting trees anywhere in the world is an effective way to combat global warming. The new study supports the practice in rain forest zones, where more trees absorb more carbon dioxide from the atmosphere. Tropical plants also produce more water vapor, adding to the thick cloud cover that reflects sunlight back into space. But the dark canopies(树冠) of northern forests absorb the sun’s rays and cover the snow that would reflect light, creating a regional warming effect.
"If you look down from an airplane, where you have seasonal snow cover and you don’t have a forest, it’s all white, and that snow is highly reflective," said study co-author Govindasamy Bala, an atmospheric scientist at Lawrence Livermore National Laboratory. "If you plant new trees, the canopy covers that snow and very little sunlight is reflected. That’s why when you plant trees there is a potential for locally warming a place."
Forest preservation and reforestation efforts are still critical for lessening global warming, Bala and colleagues caution. But "our first hypothesis was that the benefit of planting trees cannot be uniform everywhere". In addition to their conclusion about northern forests, the team found that planting more trees in mid-latitude locales-including most of the United States and Europe—may have little effect on climate change.
"Planting trees in the tropics gives you the maximum benefit if you want to slow down global warming," said Bala, "From the perspective of biodiversity and conservation, tropical forests are the most biologically important real estate anywhere." So from that perspective it’s good news to highlight efforts for protecting those forests.
Bala’s team notes that their research is only a first step toward understanding the roles of forests in complex climatic processes. They also stress that widespread deforestation would cause ecological destruction and is not a feasible option for keeping global warming in check. "The destruction of ecosystems(生态系统) to prevent global warming," the team wrote in their paper, "would be a counterproductive and ridiculous strategy."
选项
答案
planting trees in high latitudes
解析
由于题干中关键词different to the traditional idea与文中counter to long-standing arguments相呼应,可定位到原文首段第三句They run counter to long-standing arguments that planting trees anywhere in the world is an effective way to combat global warming.(这与长久以来人们认为的在世界任何地方植树都会有利地反击全球变暖的观点相左。)根据上下文的指代关系,可知,本句中的they即指文章首句Planting trees might not be such a good idea in the fight against global warming—at least not in high latitudes,根据题干的语法要求,可得答案。
转载请注明原文地址:https://kaotiyun.com/show/RPZK777K
0
大学英语六级
相关试题推荐
Environmentiseverythingthatsurroundsus:plants,animals,buildings,country,air,water—infacteverythingthatcanaffect
Travelers【T1】______intotwocategories:thosewhomakelistsandthosewhodonot.Somepeopleprefertoplanthecourseofthei
What’stheproblemtheworldisnowfacing?Theworldisnotonlyhungrybutitisalso______.
Indiaistheworld’sbiggestgoldconsumer,butthecountry’spassionfortheyellowmetaliswaning(逐渐减弱).Recordhighpricesa
Thispartistotestyourabilitytodopracticalwriting.Youarerequiredtowriteabusinessletteraccordingtothefollowin
Theschoolmadeadecisiontoadoptadifferentapproach______thephenomenonofplayingcellphonesinclass.
A、Visitplacesofinterest.B、EnjoyPekingOpera.C、HaveChinesefood.D、Dosomeshopping.C男士询问女士既然是在中国,品尝一些中餐如何,女士回答说太好了。由此可见,
A、Dr.Blockwon’tbebusythismorning.B、Thewomanwon’tmeetDr.Blockbefore12:00.C、ThewomancanmeetDr.Blockat10:00.
IwouldprobablytrytofindabetterjobifI______inyourposition.
Manypeoplesuspectthatcreditcardslurepeopleto______.Acreditcardusercancontrolhimselftotakebetteradvantageof
随机试题
下列有关女性雌激素分泌特征的叙述中错误的是
朴某系知名美容专家。某医院未经朴某同意,将其作为医院美容专家在医院网站上使用了朴某照片和简介,且将朴某名字和简介错误地安在了其他专家的照片旁。下列说法正确的是()。
某市光华商住楼,框架结构,地上6层,局部为7层,基础为钢筋混凝土条形基础,房屋总高度为22m,底层为商店,二层以上为住宅,总建筑面积8395㎡。由市建筑设计所设计,第二建筑工程公司施工总承包。该工程于2004年5月8日开工,2005年4月8日竣工。问题:
以下不属于路径-目标理论的领导行为的是()。
下列各项中,符合我国《仲裁法》规定的有( )。
温家宝总理在谈到世界金融危机时指出:“中国俗话说‘吃一堑,长一智’,我们必须从中认真吸取教训。”这体现的哲学道理是()。
物质性政策是将有形的资源和实质性的权利给予受益人,或将真正的不利条件强加给那些受相反影响的人。根据上述定义,下列政策中属于物质性政策的是()。①某省政府确立了最低工资标准②十八大报告提出社会主义核心价值观③农业部公布了“三补合一”的农业支
电影院一排有7个座位,现在4人买了同一排的票,则恰有两个空座位相邻的不同坐法有()种.
PrimaryFunctionsoftheFamilyThefamilyisabasicunitinasociety.Sociologistshaveclonemuchresearchaboutthefunc
A、GiveBobaphonecall.B、GoandpickBobup.C、GoandlookforBob.D、WaitforBob.D
最新回复
(
0
)