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1、新课标人教版课件系列,高中英语选修(模块）6-4.4,Speaking Listening,Warming up,Fossil fuel(化石燃料):Ancient animal and plant material below the surface of the earth with a high carbon content,such as coal,oil and natural gas,which can be burnt to produce energy.Also known as non-renewable energy because once they are used t
2、hey have gone forever;they cannot be renewed.,From the following pictures,you will know where all this energy comes from.,windmills,a coal power station,an oil refinery,a nuclear power plant,solar panels,hydro-electric dam,Sample lists,light,heating,coal,non-renewable,oil,non-renewable,television,ca
3、ssette player,video recorder,computer,natural gas,non-renewable,wind(wind power),renewable,sun(solar energy),renewable,uranium(nuclear energy),non-renewable,fridge,stove,washing machine,hairdryer,water(hydro-electric),renewable,plant waste(biomass energy),renewable,hot springs or geysers(geothermal
4、energy),renewable,the sea(tidal energy),renewable,Renewable or non-renewable?,Renewable or non-renewable?,What is told in the picture?,non-renewable energy source,Notes to Renewable energy Renewable energy resources may be used directly,or used to create other more convenient forms of energy.Example
5、s of direct use are solar ovens,geothermal(地温)heating,and water and windmills.,Examples of indirect use which require energy harvesting are electricity generation through wind turbines(涡轮)or photovoltaic(光电的)cells,or production of fuels such as ethanol(酒精)from biomass(生物量).,Renewable energy(sources)
6、or RES capture their energy from existing flows of energy,from on-going natural processes,such as sunshine,wind,flowing water,biological processes,and geothermal heat flows.,Most renewable energy,other than geothermal and tidal power,ultimately(基本上)come from the Sun.Some forms are stored solar energ
7、y such as rainfall and wind power which are considered short-term solar-energy storage,whereas the energy in biomass(生物量)is accumulated(积聚)over a period of months,as in straw,or through many years as in wood.,Capturing renewable energy by plants,animals and humans does not permanently deplete(耗尽)the
8、 resource.Fossil fuels,while theoretically renewable on a very long time-scale,are exploited at rates that may deplete these resources in the near future.,I.Listen to the tape and answer and decide which statement Professor Chen does NOT agree with.1.Well have to stop using fossil fuels.2.About 90%o
9、f the worlds energy comes from fossil fuels.,3.We can replace fossil fuels with renewable sources of energy.4.Nuclear power is a good source of energy.5.In the future,well need new technologies to replace fossil fuels.6.Its the developed countries who are to blame for producing most of the carbon di
10、oxide.,A sample discussionSa:I agree with Li Bin.It is the developed countries that put most of the carbon dioxide into the air,so the developed countries are really the ones to blame and to pay for that.,Sb:Well,Im afraid I disagree with you.Professor Chen is right.Whatever we do,we have to do it a
11、s a global community.Developed and developing countries should work together to improve the environment.,Sc:I hold the same viewpoint as Li Bin.In developed countries people are producing a large amount of carbon dioxide,which contributes to global warming.Isnt it their duty to do something to decre
12、ase the speed of global warming?Sa:Exactly.,Sd:It is true that the developed countries are the ones to blame and they should do something.But is it right for developing countries to look on without doing anything?Remember we have only one earth,which is like a big family.,All of us are family member
13、s.Think about this:In a family,if one child makes a mistake,what should his brothers or sisters do-blame him without doing anything or help him correct the mistake?,Sa:I see.We should take part in the action instead of looking on and complaining.Sc:I agree,too.Thank you.Ive got a better understandin
14、g about this.,Listening text(P31)Background note The USA is the largest energy user in the world and the largest producer of the greenhouse gas carbon dioxide.China comes second in both of these.,China has been going through huge economic development,and has had as much growth in one decade as the i
15、ndustrial world experienced in nearly a century.However,it has been at a high cost to the environment.,FOSSIL FUELS AND OTHER FORMS OF ENERGY Li Bin,a university student,is interviewing Professor Chen on the local student radio station about the use of fossil fuels and other sources of energy.,LI BI
16、N:Professor Chen,Ive read that well have to stop using fossil fuels if we want to reduce the amount of carbon dioxide in the air.CHEN:Yes,thats right,Li Bin.However,this will be very difficult.,You see,our modern industrial societies depend on the energy we get from fossil fuels.Its a very concentra
17、ted and cheap form of energy.So were going to keep using it and therefore keep putting carbon dioxide into the air.,LI BIN:Is it true that about 90%of the worlds energy comes from fossil fuels?CHEN:Yes,thats correct.And there is enough coal,gas and oil to last for centuries.,LI BIN:Cant we just repl
18、ace fossil fuels with renewable sources of energy like sun or wind power?CHEN:Im afraid not.Its not that simple.Renewable energy is not concentrated enough.,And you need huge areas of land to produce large quantities.Its just not possible-not with the technology we have at present anyway.,LI BIN:Wha
19、t about nuclear power?Thats a good source of energy.CHEN:Yes,I agree.Its concentrated and doesnt produce carbon dioxide but there is a limited amount of uranium-the material you need to make nuclear power.,And many people dont like it because of past accidents-like the one at Chernobyl.LI BIN:So wha
20、t can we do?,CHEN:Well,we need to find ways of using fossil fuels that dont put carbon dioxide into the air.And we need to produce more products that use less energy.It would also help a little if individuals cut down on the energy they used.,LI BIN:But,sometime in the future,well need new technolog
21、ies that will replace fossil fuels.CHEN:Exactly.However,whatever we do,we have to do it as a global community.That means developed and developing countries will have to work together.,LI BIN:But its not the developing countries who put most of the carbon dioxide into the air.The developed countries
22、are really the ones to blame.,CHEN:Yes,thats true.But,we still have to work together because global warming is going to affect everyone.If our children and our childrens children are to have a good future,we must ALL look after this planet.,Homework 1.Review the new words and expressions you learned in this class.2.Preview Reading.,
