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
27
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.
What is the dirty secret of green energy?
选项
A、Its equipment requires frequent maintenance.
B、It offers little reliable returns to the investors.
C、It costs a lot to transport the electricity it produces.
D、Its use will reduce the price of power.
答案
D
解析
转载请注明原文地址:https://kaotiyun.com/show/sjZ7777K
0
大学英语四级
相关试题推荐
A、Teacherswhoareirresponsiblefortheirstudents.B、Teacherswhodon’tcareabouttheirstudents.C、Teacherswhohavetheirf
Friendshipisoneofthebasicbondsbetweenhumanbeings.Whilethecharacteristicsoffriendshipmightvaryfromonecountryt
EveryyearinthefirstweekofmyEnglishclass,somestudentsinformmethatwritingistoohard.Theyneverwrite,unlessass
Judgingfromrecentsurveys,mostexpertsinsleepbehavioragreethatthereisvirtuallyanepidemic(流行病)ofsleepinessinthe
Withtheworld’spopulationestimatedtogrowfromsixtoninebillionby2050,researchers,businessesandgovernmentsarealre
A、HelikesSwedenbetterthanEngland.B、Heprefershotweathertocoldweather.C、HevisitsLondonnearlyeverywinter.D、Heis
Theplanetisgettinglusher,andweareresponsible.Carbondioxidegeneratedbyhumanactivityisstimulatingphotosynthesis(
TheLostArtofListeningA)"Whywon’theevenlistentomyidea?""WhyamIcutoffbeforeIprovidethewholestory?"How
A、Untilabout5:00p.m.B、Bytomorrow.C、Inafewminutes.D、Bythisevening.C信息明示题。男士问女士能不能下午5点来拿表,女士说她下午一直要工作,来不了,而明天她就要用表。男士
Weallknowthatemotionsoriginateinthebrain.Butweusuallytalkaboutouremotionscomingfromourhearts.Ifsomeoneyou
随机试题
下列关于应付债券的说法中,正确的有()。
《冯谖客孟尝君》中,孟尝君失势被逐后“就国于薛”意味着()
A.血尿B.蛋白尿C.脓尿D.乳糜尿E.脂质尿急性肾小球肾炎最具特征性的尿异常是
男,47岁。因呼吸困难和水肿入院。查体发现颈静脉怒张,肝在右肋缘下4cm,表面光滑,轻度压痛,双下肢压陷性水肿。该患者心音不会出现下列哪种改变
某矩形截面钢筋混凝土构件。截面b×h=300mm×500mm,混凝土强度等级为C30,箍筋采用HPB300,纵向受力钢筋为HRB335,as=35mm。构件上无集中荷载作用,截面受扭塑性抵抗矩Wt=18×106mm2,Ucor=1400mm,Acor=11
在现金日记账中,如果摘要栏的内容是“从银行提取现金”;则对方科目栏应填写“现金”。
两个处于不同行业的企业之间不会存在相互竞争行为。()
下列关于各类期权的说法,正确的有()。
Attheveryendof2013,asothernewspaperswarnedofaterriblefloodofmigrants,TheEconomistinvitedBulgariansandRoman
Malariakilled435,000peoplelastyear,mostoftheminAfrica.Theparasitethatcausestheillnessiscarriedbyfemalesofs
最新回复
(
0
)