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
53
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.
According to the text, the motivation for adopting daylight time______.
选项
A、was the desire to reduce energy consuming
B、was much stronger in wartime than in peace
C、was inseparable from global economic crisis
D、was to slightly cut the impact of oil embargo
答案
A
解析
根据第一段中的“…daylight time has always been a policy meant to save energy”和第二段中的“Energy conservation was the motivation for daylight time…”,A应为答案。
转载请注明原文地址:https://kaotiyun.com/show/tJzZ777K
0
考研英语一
相关试题推荐
Inthelasttenyears,theInternethasopenedupincredibleamountsofinformationtoordinarycitizens.ButusingtheInternet
Inthelasttenyears,theInternethasopenedupincredibleamountsofinformationtoordinarycitizens.ButusingtheInternet
Yamato,theancientnameofJapan,essentiallymeans"bigharmony".Toachievesuchbalance,Japanesesocietyhasrefinedaplet
Cultureisactivityofthought,andreceptivenesstobeautyandhumanefeeling.【C1】______ofinformationhavenothingtodowith
Cultureisactivityofthought,andreceptivenesstobeautyandhumanefeeling.【C1】______ofinformationhavenothingtodowith
Whatimpactcanmobilephoneshaveontheirusers’health?Manypeopleworryaboutthesupposedilleffectscausedbyradiation
Gettingotherpeopletodowhatyouwantthemtodoisanartandasciencethatyoumustmasterifyouwanttosucceedinthis
(46)Attheendofthenineteenthcentury,arisinginterestinNativeAmericancustomsandanincreasingdesiretounderstandNa
Thekeypositionandroleofwomenintheprocessofdevelopmentisincreasinglybeingrecognized.(1)_____thethreegreatWorl
Itistheworld’sfourth-most-importantfoodcrop,aftermaize,wheatandrice.Itprovidesmorecalories,morequickly,usingl
随机试题
血压骤然升高,剧烈头痛,抽搐昏迷。诊断为
患者女性,26岁,叩诊心界向左下移位,心尖区可闻及收缩期柔和、吹风样、时限短、局限的杂音,该患者的诊断不可能是
利用息止颌位确定垂直距离的方法是
患者刘某.平素情绪不畅,二天前生气后出现胁肋胀痛,走窜不定,胸闷喜太息,纳食减少,嗳气频作,舌苔薄白,脉弦。
男性,40岁,因肺炎于呼吸科求治,突发腹痛,弥漫性,经外科会诊,考虑为原发性腹膜炎。引起该病最多见的病因是
企业在自创专利权过程中所发生的所有研究开发费用、注册费用、律师费用等均应计入专利权成本并按期摊销。()
2014年第()届青年夏季奥运会于8月16日在中国南京开幕。
2013年,重庆市房地产开发企业完成投资突破3000亿大关,达3012.78亿元,同比增长20.1%,较一季度回落5.2个百分点,比上半年回落7.6个百分点,比前三季度回落0.5个百分点。截至12月月底,全市商品房施工面积26251.89万平方米,同比增
下面有关英国宪法的问题,错误的是()
WhatdoesthewriterthinkofpeoplewhoaremakingNewYear’splans?Thewritertriestoletpeopleknowthatabiggoal_____
最新回复
(
0
)