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
Why do we along with 75 other countries—alternate between standard time and daylight time? Although many people believe it has a
Why do we along with 75 other countries—alternate between standard time and daylight time? Although many people believe it has a
admin
2015-09-30
83
问题
Why do we along with 75 other countries—alternate between standard time and daylight time? Although many people believe it has an agricultural provenance, daylight time has always been a policy meant to save energy. As Benjamin Franklin argued, if people moved up their summer schedules by an hour, they could live by "sunshine rather than candles" in the evenings.
Energy conservation was the motivation for daylight time during World Wars I and II and the oil embargo of the 1970s, and it remains so today—even though there has been little scientific evidence to suggest daylight time actually helps us cut back on electricity use.
Recently, however, we were able to conduct a study in Indiana, where daylight time was instituted statewide only in 2006. Before that year, daylight time was in effect in just a handful of counties. This change of policy offered a unique, natural experiment to measure the overall effect on residential electricity consumption. We could compare the amount of energy used by households in the late-adopting counties during the two years before they switched to daylight time with the amounts they used during the year afterward—while using counties that always practiced daylight time as a control group.
We found that daylight time caused a 1 percent overall increase in residential electricity use, though the effect varied from month to month. The greatest increase occurred in late summer and early fall, when electricity use rose by 2 percent to 4 percent.
Daylight time costs Indiana households an average of $3. 29 a year in higher electricity bills, or about $ 9 million for the whole state. We also calculated the health and other social costs of increased pollution emissions at $1.7 million to $5.5 million per year.
What explains this unexpected result? While daylight time reduces demand for household lighting, it increases demand for heating in the early spring and late fall(in the mornings)and, even more important, for cooling on summer evenings. Benjamin Franklin was right about candles, in other words, but he did not consider air-conditioners.
In regions of the United States where demand for air-conditioning is greater than in Indiana, this spike in cooling costs is likely to be even greater. Arizona, one of the hottest states, may have it right; it does not practice daylight time.
Eliminating daylight time would thus accord with President-elect Barack Obama’s stated goals of conserving resources, saving money, promoting energy security and reducing climate change. At the very least, we should abandon the notion that we are saving energy while enjoying the extra hour of sunlight on hot summer evenings.
Daylight time is used in many countries because______.
选项
A、it is an acceptable alternative for standard time
B、it is a special convention in agricultural society
C、it is considered an effective way to save energy
D、it is a practice to make best use of solar energy
答案
C
解析
根据第一段中的“…daylight time has always heen a policy meant to save energy”,C应为答案。
转载请注明原文地址:https://kaotiyun.com/show/kJzZ777K
0
考研英语一
相关试题推荐
(46)Thejobofraisingchildrenisatoughone.Childrendon’tcomewithaninstructionmanual.Andeachchildisdifferent.So
Accordingtothepassage,—isthemostimportantfunctionofinstitutionsofhighereducation.Aseriousoutcomebroughtoutby
Cultureisactivityofthought,andreceptivenesstobeautyandhumanefeeling.【C1】______ofinformationhavenothingtodowith
SupposeCharlesDarwinhadbeensweptoverboardanddrownedduringthevoyageoftheBeagle.Whatwouldtheworldbelikewithou
Whatimpactcanmobilephoneshaveontheirusers’health?Manypeopleworryaboutthesupposedilleffectscausedbyradiation
Thekeypositionandroleofwomenintheprocessofdevelopmentisincreasinglybeingrecognized.(1)_____thethreegreatWorl
Itistheworld’sfourth-most-importantfoodcrop,aftermaize,wheatandrice.Itprovidesmorecalories,morequickly,usingl
Sportpsychologyresearchhasdocumentedtheimportantroteofsignificantadultssuchasparentsandcoachesinyouthparticipa
AsGilbertWhite,Darwin,andothersobservedlongago,allspeciesappeartohavetheinnatecapacitytoincreasetheirnumbers
ThemostthoroughlystudiedintellectualsinthehistoryoftheNewWorldaretheministersandpoliticalleadersofseventeenth
随机试题
下列属于外围护系统现场实验和测试的项目是()。
自发性蛛网膜下腔出血伴一侧动眼神经麻痹提示
男性患者,58岁,上腹疼痛,反酸,内镜检查发现,十二指肠降段、水平段及空肠多发性溃疡,抑酸治疗效果不佳。进一步应做的检查是
我国现行宪法中的哪项规定充分表明了我国的国家性质?()
试论述行政诉讼的受案范围。
位于北京市朝阳区的某高架桥建设项目未按照环境报告书安装隔音设施便已通车,按照《环境保护法》的规定,应对其实施( )的行政处罚。
()为不定期报告,根据董事会、高级管理层或其委员会要求,提交董事会、高级管理层或其委员会审议或审阅。
在对有爆炸发生的事件进行现场评估时,若发现是恐怖袭击事件,接下来的正确处置方法是()。
下列叙述中,错误的是()
Thesetechnologicaladvancesincommunicationhave______thewaypeopledobusiness.
最新回复
(
0
)