Renewable Energy Sources
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
国际英语资讯:Japan OKs retinal cell transplant using others iPS cells
女性选内衣常见的10个误区:你中了几个?
这才是应对欺凌的正确方法
国内英语资讯:Beijing sees record high park visits over Spring Festival period
国内英语资讯: Mexico seeks to bolster ties with China, attract investment
体坛英语资讯:Atletico and Barca battle it out for Cup final place
BBC:总有那么些英文词 连母语者都觉得懵逼
国内英语资讯:Beijing receives over 2 bln cubic meters of water from Yangtze
国际英语资讯:U.S. prison on lockdown after guards taken hostage by inmates
娱乐英语资讯:China rewrites single-day box office record
国内英语资讯: Chinas power use expected to grow by 3 pct in 2017
体坛英语资讯:Dutch top three unchanged after 20th match round
魁北克清真寺枪击案:加拿大学生被起诉
超级自行车
体坛英语资讯:Nadal pulls out of Davis Cup
国际英语资讯:Putin, Orban agree on necessity of strengthening cooperation in fight against terrorism
国内英语资讯:Lock-up shares worth 291.3 bln yuan eligible for trade
2017年12星座财运解析:想发财?这样来!
国内英语资讯: Two traffickers killed, 330 kg drugs seized in SW China
50个关于人生的问题
体坛英语资讯:Spanish football league plans to adopt video referees in 2018
体坛英语资讯:Pato joins Chinas Tianjin Quanjian
国内英语资讯: Feature: Greeks celebrate Chinese New Year in Athens
国内英语资讯:Road to reach last two towns in Tibet
国际英语资讯:U.S. Senate confirms Tillerson as Secretary of State
国际英语资讯:Russia accuses Ukraine of undermining Minsk deals
涨知识:处理批评的正确方法
前联合国秘书长潘基文不会竞选韩国总统
体坛英语资讯:Leverkusen sign Bailey from Genk
国际英语资讯:Swedish, German leaders slam U.S. travel ban