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
2023-06-21
20
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:https://tihaiku.com/zcyy/2771418.html
相关试题推荐
[originaltext]AlmostallstatesinAmericahaveastatefair.Theylastforone
[originaltext]AlmostallstatesinAmericahaveastatefair.Theylastforone
FormanypeopleintheU.S.,sportsarenotjustforfun.Theyarealmosta
FormanypeopleintheU.S.,sportsarenotjustforfun.Theyarealmosta
FormanypeopleintheU.S.,sportsarenotjustforfun.Theyarealmosta
FormanypeopleintheU.S.,sportsarenotjustforfun.Theyarealmosta
FormanypeopleintheU.S.,sportsarenotjustforfun.Theyarealmosta
Theearliestprocessofmakingpaperwasdonealmost5,000yearsagoinEgyp
Thephrasealmostcompletesitself;midlifecrisis.It’sthestageinthemi
Thephrasealmostcompletesitself;midlifecrisis.It’sthestageinthemi
随机试题
Afterseeingwhatdisasterhehadbroughttohisfamily,he______ofintemperat
[originaltext]W:Morning,thisisTGC.M:Goodmorning.WalterBarryhere,call
26岁,停经45天,阴道不规则出血4天,血HCG66μg/ml,结合超声图像,最
个人业绩考核关注的是()。A.绩效计划 B.绩效指标设定 C.绩效执行 D
公共建筑用气设备不官设置在地下室、半地下室内。当必须设置在地下室、半地下室内时,
A.心尖部听诊音调低,强度响,历时长 B.心底部听诊音调高,强度弱,历时短
中药的五味是指()A.酸、苦、甘、辛、麻 B.酸、甜、苦、辣、咸 C.
男性,45岁,低热咳嗽左侧胸痛2周,夜间偶有盗汗,胸片和B超提示左侧大量胸腔积液
Howcanhighschoolstudentsearncredit
下列生产控制方式中,具有反馈控制特点的是()。A.事前控制方式 B.事中控制
最新回复
(
0
)