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
Renewable Energy Sources Today petroleum provides around 40% of the world’s energy needs, mostly fuelling automobiles. Coal is
Renewable Energy Sources Today petroleum provides around 40% of the world’s energy needs, mostly fuelling automobiles. Coal is
admin
2012-12-03
53
问题
Renewable Energy Sources
Today petroleum provides around 40% of the world’s energy needs, mostly fuelling automobiles. Coal is still used, mostly in pover stations, to cover one-quarter of our energy needs, but it is the least efficient, unhealthiest and most environmentally damaging fossil fuel. Natural gas reserves could plug some of the gap from oil, but reserves of that will not last into the 22nd century either. Most experts predict we will exhaust easily accessible reserves within 50 years. We could fast reach an energy crisis. We need to rapidly develop sustainable solutions to fuel our future. Less-polluting renewable energy sources offer a more practical long-term energy solution. They may benefit the world’s poor too. “Renewable” refers to the fact that these resources are not used faster than they can be replaced.
Hydroelectric power is now the most common form of renewable energy, supplying around 20% of world electricity. China’s three gorges Dam, which has just been completed, is the largest ever. At five times the size of the US’s Hoover Dam, its 26 turbines will generate the equivalent energy of 18 coal-fired power stations. It will satisfy 3% of China’s entire electricity demand.
In 2003, the first commercial power station to harness tidal currents in the open sea opened in Norway. It is designed like windmill, but others take the form of turbines.
As prices fall, wind power has become the fastest growing type of electricity generation –quadrupling worldwide between 1999 and 2005. Modern wind farms consist of turbines that generate electricity. Though it will be more expensive, there is more than enough wind to provide the world’s entire energy needs. Wind farms come in onshore and offshore forms. They can often end up at spots of natural beauty, and are often unpopular with residents. And turbines are not totally benign – they can interfere with radar and leave a significant ecological footprint, altering climate and lilling sea birds. Migrating birds may have more luck avoiding them. Scotland is building europe’s largest wind farm, which wil power 200,000 homes. The UK’s goal is to generate onefifth of power from renewable sources, mainly wind, by 2020. But this may cause problems, because wind is unreliable.
According to the passage,resources like wind are
选项
A、renewable.
B、recyclable.
C、damaging.
D、scarce.
答案
A
解析
转载请注明原文地址:https://kaotiyun.com/show/IYQd777K
本试题收录于:
职称英语理工类B级题库职称英语分类
0
职称英语理工类B级
职称英语
相关试题推荐
EasyLearningStudentsshouldbejealous.Notonlydobabiesgettodozetheirdaysaway,butthey’vealsomasteredthefineart
ActiveinOldAgeKeepsPeopleMobilePeopleover70whoaren’tactivearemorelikelytodevelopproblemswalkingorclimbin
PromisingResultsfromCancerStudyAnewexperimentalvaccine(疫苗)hasshownpromisingresultsinthefightagainstlungcanc
TeachingandLearningMedicineAwardTwoscientistswhohavewonpraiseforresearchintothegrowthofcancercellscouldb
MigrantWorkersInthepasttwentyyears,therehasbeenanincreasingtendencyforworkerstomovefromonecountrytoanot
AforyoungerandolderpeopleBtotheproperfunctionofyourmemoryCiscalledlong-termmemoryDthecapacitytostorewhat
AforyoungerandolderpeopleBtotheproperfunctionofyourmemoryCiscalledlong-termmemoryDthecapacitytostorewhat
AforyoungerandolderpeopleBtotheproperfunctionofyourmemoryCiscalledlong-termmemoryDthecapacitytostorewhat
WhatIsaDream?Forcenturies,peoplehavewonderedaboutthestrangethingsthattheydreamabout.Somepsychologistssay
SomesleepdrugsdomorethanmakeyousleepTheUnitedStatesFoodandDrugAdministration(美国食品及药品管理局)hasorderedcompani
随机试题
高适《燕歌行》:战士军前半死生,_______。
某医院为了全面预防传染性非典型肺炎(SARS)在冬春季可能出现的流行和传播,特制定一整套消毒防疫措施,进行了消毒剂(器)的采购和专业人员的培训,布置了立体的防疫网络。对医院室内空气消毒主要采用
初产妇,26岁,妊娠39周,近3日头痛、视力模糊,今晨开始头痛加重,呕吐2次,急诊入院。假设诊断确定,最有重要价值的病史是()
完带汤适用于带下病的哪种证候()
混合气体或混合液体中各组分含量有三种表示方法,不包括()。
根据《职业病防治法》,建设单位违反本法规定,有下列行为之一的:(一)未按照规定进行职业病危害预评价或者未提交职业病危害预评价报告,或者职业病危害预评价报告未经卫生行政部门审核同意,擅自开工的;(二)建设项目的职业病防护设施未按照规定与主体工程同时投入生
主持焊接工艺评定工作和对焊接及试验结果进行综合评定的人员是()。
在Windows中,要把图标设置成缩略图方式,应在()下面菜单中设置。
民用航空器致人损害的免责事由为()
TheJourneyofSelfImprovementI.PhasesofthejourneyofselfimprovementA.Thefirstphase:relyingon【T1】______,speakers
最新回复
(
0
)