Worldwide every day,we devour the energy equivalent of about 200 million barrels of oil.Most of the energy on Earth comes from the Sun.In fact enough energy from the Sun hits the planets surface each minute to cover our needs for an entire year,we just need to find an efficient way to use it.So far the energy in oil has been cheaper and easier to get at.But as supplies dwindle,this will change,and we will need to cure our addiction to oil. Today petroleum,a mineral oil obtained from below the surface of the Earth and used to produce petrol,diesel oil and various other chemical substances,provides around 40% of the worlds energy needs,mostly fuelling automobiles.The US consumes n quarter of all oil,and generates a similar proportion of greenhouse gas emissions. Most experts predict we will exhaust easily accessible reserves within 50 years,though opinions and estimates vary.We could fast reach an energy crisis in the next few decades,when demand exceeds supply.As conventional reserves become more difficult to access,others such as oil shales and tar sands may be used instead.Petrol could also be obtained from coal.
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2016高考英语总复习精选课件(江苏专用)牛津译林版选修8《Unit 1 The written world》
2016高考英语总复习精选课件(江苏专用牛津译林版)专项提能计划:书面表达(一)
2016高考英语总复习精选课件(江苏专用牛津译林版)语法专项突破:一、代词
2016高考英语总复习精选课件(江苏专用牛津译林版)语法专项突破:四、动词和动词短语
2016高考英语总复习精选课件(江苏专用)牛津译林版选修7《Unit 3 The world online》
2016高考英语总复习精选课件(江苏专用)牛津译林版选修7《Unit 4 Public transport》
2016高考英语总复习精选课件(江苏专用)牛津译林版选修8《Unit 4 Films and film events》
2016高考英语总复习精选课件(江苏专用牛津译林版)语法专项突破:七、时态和语态
2016高考英语总复习精选课件(江苏专用牛津译林版)专项提能计划:书面表达(三)
2016高考英语总复习精选课件(江苏专用牛津译林版)专项提能计划:阅读理解(四)
2016高考英语总复习精选课件(江苏专用)牛津译林版选修8《Unit 2 The universal language》
2016年高考总复习优化英语课件(四川专用)写作教程:Module6
2016高考英语总复习精选课件(江苏专用)牛津译林版选修7《UNIT1-2》句型公式妙笔生花
2016高考英语总复习精选课件(江苏专用)牛津译林版选修8《UNIT3-4》佳作晨背·文思泉涌
2016高考英语总复习精选课件(江苏专用牛津译林版)语法专项突破:二、名词、冠词
2016高考英语总复习精选课件(江苏专用牛津译林版)专项提能计划:书面表达(八)
2016高考英语总复习精选课件(江苏专用牛津译林版)语法专项突破:十一、特殊句式
2016高考英语总复习精选课件(江苏专用牛津译林版)语法专项突破:八、定语从句
2016高考英语总复习精选课件(江苏专用牛津译林版)语法专项突破:十、状语从句
2016高考英语总复习精选课件(江苏专用)牛津译林版选修6《Unit 4 Helping people around the world》
2016高考英语总复习精选课件(江苏专用牛津译林版)专项提能计划:阅读理解(三)
2016年高考总复习优化英语课件(四川专用)写作教程:Module1
2016年高考总复习优化英语课件(四川专用)写作教程:Module4
2016高考英语总复习精选课件(江苏专用牛津译林版)语法专项突破:三、形容词和副词
2016高考英语总复习精选课件(江苏专用牛津译林版)专项提能计划:完形填空(四)
2016高考英语总复习精选课件(江苏专用牛津译林版)专项提能计划:书面表达(五)
2016高考英语总复习精选课件(江苏专用牛津译林版)语法专项突破:六、情态动词和虚拟语气
2016高考英语总复习精选课件(江苏专用)牛津译林版选修6《Unit 3 Understanding each other》
2016高考英语总复习精选课件(江苏专用牛津译林版)专项提能计划:完形填空(二)
2016高考英语总复习精选课件(江苏专用牛津译林版)专项提能计划:书面表达(七)