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
Almost 150 years after photovoltaic (光电的) cells and wind turbines (涡轮机) were invented, they still generate only 7% of the world’
Almost 150 years after photovoltaic (光电的) cells and wind turbines (涡轮机) were invented, they still generate only 7% of the world’
admin
2019-04-27
54
问题
Almost 150 years after photovoltaic (光电的) cells and wind turbines (涡轮机) were invented, they still generate only 7% of the world’s electricity. Yet something remarkable is happening. From being secondary to the energy system just over a decade ago, they are now growing faster than any other energy source and their falling costs are making them competitive with fossil fuels. BP, an oil firm, expects renewables to account for half of the growth in global energy supply over the next 20 years. It is no longer far-fetched to think that the world is entering an era of clean, unlimited and cheap power.
There is a problem, though. To get from here to there requires huge amounts of investment over the next few decades. Normally investors like putting their money into electricity because it offers reliable returns. Yet green energy has a dirty secret. The more it is used, the more it lowers the price of power from any source. That makes it hard to manage the transition to a carbon-free future, during which many generating technologies, clean and dirty, need to remain profitable if the lights are to stay on. Unless the market is fixed, subsidies to the industry will only grow.
Policymakers are already seeing this inconvenient truth as a reason to put the brakes on renewable energy. In parts of Europe, investment in renewables is slowing as subsidies are cut back. However, the solution is not less wind and solar. It is to rethink how the world prices clean energy in order to make better use of it.
At its heart, the problem is that government-supported renewable energy has been imposed on a market designed in a different era. For much of the 20th century, electricity was made and moved by vertically integrated, state-controlled monopolies. From the 1980s onwards, many of these were broken up, privatized and liberalized, so that market forces could determine where best to invest. Today only about 6% of electricity users get their power from monopolies. Yet everywhere the pressure to decarbonize power supply has brought the state creeping back into markets. This is disruptive for three reasons. The first is the subsidy system itself. The other two are inherent to the nature of wind and solar: their intermittency and their very low running costs. All three help explain why power prices are low and public subsidies are addictive.
Why can photovoltaic cells and wind turbines compete with fossil fuels?
选项
A、They are clean and unlimited.
B、Their costs keep lowering down.
C、They can produce power more efficiently.
D、They receive more subsidies from the government.
答案
B
解析
转载请注明原文地址:https://kaotiyun.com/show/ojZ7777K
0
大学英语四级
相关试题推荐
Withtheworld’spopulationestimatedtogrowfromsixtoninebillionby2050,researchers,businessesandgovernmentsarealre
A、Theycaneasilyswitchtonaturalgas.B、Theyneedtobefurtherimproved.C、Theyaremorecost-effectivethanvehiclespowere
A、Theyarewellpaid.B、TheyaremainlyfromNewYorkState.C、Theyusuallystayfortwoyears.D、Theyneedn’tpayfortheirren
7SecretTestsofAttractionA)You’reasmart,attractiveperson.Soyouwouldn’tbesurprisedifoneofyourfriendsgottheh
ForoverthreedecadesIntelhasbeenprovidingSemi-conductorchipsforcomputerhardwaremakersaroundtheworld.Intel’schip
A、Lovingforpeopleinneed.B、Collectivetradition.C、Respectingfortheelderly.D、Beingfrugal.B
A、Marketcrowdskeptthebusinessgoing.B、Socialnetworkshelpedinformrestaurants’specialoffers.C、Theadsontheinternet
《史记》(RecordsoftheGrandHistorian)是一部伟大的史学著作,为西汉时期(theWesternHanDy-nasty)司马迁所著。《史记》记载了我国从黄帝(YellowEmperor)到西汉时期长达3000年左右的历
"Laugh,andtheworldlaughswithyou:weep,andweepalone."SowrotethepoetEllaWheelerCox.Emotionsarecatching,andmos
A、HelikesSwedenbetterthanEngland.B、Heprefershotweathertocoldweather.C、HevisitsLondonnearlyeverywinter.D、Heis
随机试题
下列审美形态属于中国的是()
IneverexpectedJohnto______atthemeeting,becauseIthoughthewasstillinhospital.
女性患者,41岁,查体见胸骨左缘第3~4肋间异常搏动,其诊断可能是
遗尿夜梦多者,宜加用()遗尿肾阳虚者,宜加用()
肾上腺素盐酸云氧肾上腺素
当建筑工程只有装饰装修部分时,该工程应作为()工程验收。
下列测量方法中,最适合测绘建筑物立面图的是()。
均质坝应使中部凸起,分别向上下游倾斜()的坡度。
在大班美术活动“美丽的服装”中,某老师请幼儿观赏生活中各种服装的款式、图案、色彩、质地等,之后让幼儿自主选择材料设计、装饰服装,当有的幼儿提出不会装饰或画不好时,该老师便引导幼儿再次欣赏,感受风格各异的服装。鼓励他们用自己喜欢的方式大胆表现。活动结束后,该
中国共产党同各民主党派合作的基本方针包括()。
最新回复
(
0
)