Today petroleum provides around 40% of the worlds 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 worlds 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. Chinas three gorges Dam, which has just been completed, is the largest ever. At five times the size of the USs Hoover Dam, its 26 turbines will generate the equivalent energy of 18 coal-fired power stations. It will satisfy 3% of Chinas 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 worlds 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 europes largest wind farm, which wil power 200,000 homes. The UKs goal is to generate onefifth of power from renewable sources, mainly wind, by 2020. But this may cause problems, because wind is unreliable. 1.According to the passage,which of the following is the most polluting energy resource? A.Petroleum. B.Coal. C.Natural gas D.Water. 2.Chinas Three Gorges Dam A.is the first hydroelectric dam in the world. B.is of the same size as the USs Hoover Dam. C.can generate around 3% of world electricity. D.is the largest hydroelectric dam in the world. 3.Which country took the lead in making use of tidal currents to produce power in 2003? A.The UK. B.China. C.Norway. D.The US. 4.One of the problems with wind farms is that A.there is not enough wind. B.wind is not reliable. C.they can only be built on the sea. D.they might influence the world economy. 5.According to the passage,resources like wind are A.renewable. B.recyclable. C.damaging. D.scarce. 答案 B、D、C、B、A
雅思真经句型英汉互译-简单句
雅思听力场景和词汇 新生报到场景
雅思小作文词汇句式
做雅思阅读 记雅思词汇:True
胡敏故事背雅思单词4(advisory-ailment)
雅思听力场景和词汇 住宿(下)
雅思听力词汇 - 学科重点词汇
雅思听力场景词汇:旅游出行篇
雅思阅读部分的词汇基本范围
雅思词汇:汽车
雅思听力场景和词汇 住宿(上)
雅思听力场景词汇:指路
雅思分类词汇 - 体育游泳篇
雅思口语饮食词汇提高篇:传统美食菜系 (Tradi
雅思分类词汇 - 信用卡相关用语
雅思词汇记忆方法谈
雅思听力场景和词汇 课外调查场景
雅思考试需要多少词汇
雅思词汇:运动类
False or Not Given
雅思听力场景和词汇 计算机房场景
雅思英语派对词(Paired words)
英文单词也"男女有别"
雅思听力场景词汇:课题课程篇
雅思听力场景和词汇 旅游场景
雅思场景词汇--机房场景词汇
雅思听力场景和词汇 选课场景
雅思听力重要背景词汇汇总
雅思场景词汇--健康场景词汇
专业外语词根、前缀、后缀
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