首页
登录
职称英语
Almost 150 years after photovoltaic (光电的) cells and wind turbines (涡轮机) w
Almost 150 years after photovoltaic (光电的) cells and wind turbines (涡轮机) w
游客
2024-01-23
35
管理
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. [br] 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
细节辨认题。第二段提到发展绿色能源面临的问题。第四句提到,绿色能源有一个不让人喜欢的秘密。第五句进一步解释这个秘密,即绿色能源使用得越多,就能更多地降低任何能源发电的电力价格,故答案为D。
转载请注明原文地址:http://tihaiku.com/zcyy/3387704.html
相关试题推荐
FormanypeopleintheU.S.,sportsarenotjustforfun.Theyarealmosta
FormanypeopleintheU.S.,sportsarenotjustforfun.Theyarealmosta
FormanypeopleintheU.S.,sportsarenotjustforfun.Theyarealmosta
FormanypeopleintheU.S.,sportsarenotjustforfun.Theyarealmosta
FormanypeopleintheU.S.,sportsarenotjustforfun.Theyarealmosta
Theearliestprocessofmakingpaperwasdonealmost5,000yearsagoinEgyp
Theearliestprocessofmakingpaperwasdonealmost5,000yearsagoinEgyp
Theearliestprocessofmakingpaperwasdonealmost5,000yearsagoinEgyp
Thephrasealmostcompletesitself;midlifecrisis.It’sthestageinthemi
Thephrasealmostcompletesitself;midlifecrisis.It’sthestageinthemi
随机试题
Chinastarteditsspaceindustryonlyinrecentyears,andshould_______nolim
She_______fiftyorsowhenIfirstmetherataconference.A、hadbeenB、mustbe
Reebokexecutivesdonotliketoheartheirstylishathleticshoescalled"f
A.前车采取制动时没看后视镜 B.前车采取制动过急 C.后车超车时距离前车太
汗证,汗出恶风,稍劳汗出尤甚,易于感冒,体倦乏力,面色少华,苔薄白,脉细弱。辨证
混凝土或抹灰基层涂刷溶剂型涂料时,含水率不得大于( )。 A、8% B、
(共用题干)患者男,16岁,2天前摔伤右肘部,查体:右肘部关节肿胀,压痛明显,活
共用题干 患者,女性,28岁。因外出春游出现咳嗽、咳痰伴喘息1天入院。体检:体
现代市场营销观念以()为导向,以整件营销为手段。A.购买力 B.企业擅长的
化工生产中的加氢裂化是在高温高压下进行的,加氢裂化装置较多。下列关于加氢裂化过
最新回复
(
0
)