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
On the surface, shopping online seems environmentally friendly: it eliminates car trips and carbon emissions. But what about the
On the surface, shopping online seems environmentally friendly: it eliminates car trips and carbon emissions. But what about the
admin
2019-10-13
49
问题
On the surface, shopping online seems environmentally friendly: it eliminates car trips and carbon emissions. But what about the emissions from fleets of delivery vehicles bringing orders to houses? Delivery trucks also contribute substantially to the burden of PM2.5, which is associated with many effects on human health.
Researchers recently conducted a survey of downtown Newark residents’ shopping habits and preferences to calculate the quantity of goods purchased online. They also used the information from delivery companies about the number of trucks on the road and the number of packages per truck to determine how many delivery trucks are required to distribute home shopping purchases. Finally, the researchers used transportation simulation software and data from local transportation authorities to determine the effect of delivery trucks on the transportation network, focusing on an area of downtown Newark that includes a portion of the university’s campus. They conducted similar analyses in 2001, at the dawn of the online shopping era, and again in 2008.
Curiously, the 2008 data suggested that home shopping in Newark had grown by only 14.8% since 2001. That’s much less than the researchers predicted in their earlier study. It also contrasts with data from other researchers showing that Internet shopping increased six-fold between 2001 and 2011.
This is
an unexpected finding
. However, a large proportion of their survey respondents were university students, and the convenience of Internet shopping may appeal more to people who are running a household. Also, the researchers’ latest data are from 2008, which suggests that their study underestimates the effect of home shopping on the transportation network.
In any case, the researchers found that even though home shopping by residents of Newark grew more slowly than anticipated, traffic in 2008 was worse than they had predicted, for more home shopping purchases increase travel time, traffic delays, and vehicle emissions of the transportation network.
While some previous studies suggest that e-commerce is associated with lower carbon emissions than traditional retail, other researchers have warned of a "rebound effect, " which occurs when gains in efficiency merely stimulate new consumption. Something similar may be going on in Newark, the results suggest.
"We found that the total number of vehicles miles travelled hasn’t decreased at all with the growth of online shopping, " says study leader Arde Faghri. "This suggests that people are using the time saved by Internet shopping to do things like eating out at restaurants, going to the movies, or visiting friends."
The unexpected finding mentioned in Paragraph Four refers to the finding that______.
选项
A、many of the survey respondents were university students
B、housewives are normally more interested in online shopping
C、home shopping in Newark grew more slowly than anticipated
D、Internet shopping increased six-fold between 2001 and 2011
答案
C
解析
文章第三段说明unexpected finding的内容。该段前两句的大意是:有趣的是,2001—2008年之间,纽瓦克市网上购物只增加了14. 8%,这远远低于人们以前的预测。
转载请注明原文地址:https://kaotiyun.com/show/sJHO777K
0
研究生英语学位课统考(GET)
相关试题推荐
Ingeneral,oursocietyisbecomingoneofgiantenterprisesdirectedbyabureaucraticmanagementinwhichmanbecomesasmall,
InthefirstyearorsoofWebbusiness,mostoftheactionhasrevolvedaroundeffortstotaptheconsumermarket.Morerecentl
"Ihavegreatconfidencethatbytheendofthedecadewe’llknowinvastdetailhowcancercellsarise,"saysmicrobiologistRo
"Ihavegreatconfidencethatbytheendofthedecadewe’llknowinvastdetailhowcancercellsarise,"saysmicrobiologistRo
Electronicmailhasbeeninwidespreaduseformorethanadecade,simplifyingtheflowofideas,connectingpeoplefromdistant
Electronicmailhasbeeninwidespreaduseformorethanadecade,simplifyingtheflowofideas,connectingpeoplefromdistant
"Ihavegreatconfidencethatbytheendofthedecadewe’llknowinvastdetailhowcancercellsarise,"saysmicrobiologistRo
______fromspace,ourearth,withwatercovering70%ofitssurface,appearsasa"blueplanet".
Theconsumer______inrecentyearshasledtoanexplosionofshoppingcenterdevelopmentinbigcitieslikeBeijing,Shanghaian
(清华大学2008年试题)ThechangesingloballyaveragedtemperaturethathaveoccurredattheEarth’ssurfaceoverthepastcenturya
随机试题
CT扫描发现左心后区类圆形“肿块”影,内含少量气体,与横膈关系密切。下述疾病中可能性最大的是
A.酸败B.破裂C.分层D.转相E.絮凝乳滴聚集成团但保持乳滴的完整分散体而不呈现合并现象
某投保人缴净保费P=1800元,附加费比例k=10%,则该投保人缴纳的营业保费为( )元。
某企业取得3年期银行存款1000万元,年利率8%,半年付息一次,到期一次还本,筹资费用率为l%,企业所得税率为25%。该企业的银行借款资本成本为()。
德国古典哲学是马克思主义哲学的直接理论来源。()
阅读《一个小官吏之死》这篇小说的片断,完成下列题。一个极好的傍晚,一个同样极好的名叫伊万.德米特里奇.切尔维亚科夫的庶务官坐在剧院大厅第二排的围椅上,架上望远镜观看《哥纳维勒的钟》。他凝神注目,飘然欲仙。突然……在小说里经常遇到“突然”这两个字。
王珏、柳枚、江倩三人分别是三个孩子的母亲,她们带着自己的孩子一同去郊游。王珏对自己的孩子说:“真有趣,你们这三个孩子,也是一个姓王,一个姓柳,一个姓江,但是你们都不和自己的母亲同姓。”另一个姓江的孩子说:“一点都没错。”根据上述条件,请判断以下哪项为真?
在美化演示文稿版面时,下列叙述不正确的是______。
在窗体上画一个名称为Command1的命令按钮和一个名称为Text1的文本框,并编写如下事件过程:PrivateSubCommand1_Click()DimiAsInteger,aAsInteger,jAsInteger
Forthispart,youareallowed30minutestowriteashortessayonthetopicBroadenOurKnowledge.Youshouldwriteatleast1
最新回复
(
0
)