大学英语听力3第一单元 文本打印范本.docx

1、大学英语听力3第一单元 文本打印范本Part1 B1.The Amazon forests are disappearing because of increased burning and tree removal. In September, satellite pictures showed more than 20000 fires burning in the Amazon. Experts say most of these fires were set by farmers. The farmers were attempting to clear land to grow cr

2、ops. The World Wildlife Fund says another serious problem is that too many trees in the Amazon rain forest are being cut down. The World Wildlife Fund says the fires show the need for urgent international action to protect the worlds rain forests. The group warns that without such action some forest

3、s could be lost forever.2.Environmental issues swell to the full in Berlin this week, for the UN spongsored conference on global warming and climate change is the first such meeting since the Rio summit three years ago. With scientists and governments now generally ready to accept that the earth cli

4、mate is being affected by emissions of CO2 and other greenhouse gases, over a hundred countries are sending delegations. But how much progress has been made implementing the greenhouse gas reduction target agreed on at Rio? Simon Dary reports.Part2 AI-InterviewerB-Brian CowlesI:Brian Cowles is the p

5、roducer of a new series of documentaries called The Earth at Risk which can be seen on Channel 4 later this month. Each program deals with a different continent, doesnt it, Brian? B:Thats right. We went to America, both North and South and then we went over to Africa and South-East Asia.I:And what d

6、id you find in each of these continents?B:Starting with Africa, our film shows the impact of the population on the environment. Generally speaking, this has caused the Sahara Desert to expand. Its a bit of a vicious circle we find. People cut down trees for firewood and their domestic animals eat al

7、l the available plants and so consequently they have to move south as the Sahara Desert expands further south. I mean, soon the whole of Mali will become a desert. And in East Africa: here the grasslands are supporting too many animals and the result is, of course, theres no grass nothing for the an

8、imals to eat.I:I see. And the next film deals with North America?B:Thats right. In the USA, as you know, intensive agriculture requires a plentiful supply of rain for these crops to grow, I mean if there isnt enough rain the crops dont grow. And growing crops stabilize soil, without them the top soi

9、l just blows away. This is also true for any region that is intensely farmed most of Europe, for example.I:And what did you find in South America?B:In South America (as in Central Africa and Southern Asia) tropical forests are being cut down at an alarming rate. This is done so that people can suppo

10、rt themselves by growing food or to create ranches where cattle can be raised to be exported to Europe or America as tinned meat. The problem is that the soil is so poor that only a couple of harvests are possible before this very thin soil becomes exhausted. And it cant be fed with fertilizers like

11、 agricultural land in Europe.For example, in Brazil in 1982 an area of jungle the size of Britain and France combined was destroyed to make way for an iron ore mine. Huge numbers of trees are being cut down for exports as hardwood to Japan, Europe, USA to make things like luxury furniture. These for

12、ests cant be replaced the forest soil is thin and unproductive and in just a few years, a jungle has become a waste land. Tropical forests contain rare plants (which we can use for medicines, for example) and animals one animal or plant species becomes extinct every half hour. These forest trees als

13、o have worldwide effects. You know, they convert carbon dioxide into oxygen. The consequence of destroying forests is not only that the climate of that region changes (because there is less rainfall) but this change affects the whole world. I mean, over half the worlds rain forest has been cut down

14、this century. BI-InterviewerB-Brian CowlesI:Brian Cowles is the producer of a new series of documentaries called The Earth at Risk which can be seen on Channel 4 later this month. Each program deals with a different continent, doesnt it, Brian? B:Thats right, yes, we went to . er . we went to Americ

15、a, both North and South and then we went over to Africa and South-East Asia.I:And what did you find in each of these continents?B:Well .er . starting with . er . Africa, our film shows the impact of the population on the environment. Generally speaking, this has caused the Sahara Desert to expand. I

16、ts a bit of a vicious circle . er . we find, people cut down trees for firewood and their domestic animals eat all the available plants and so consequently they have to move south as the Sahara Desert expands further south. I mean, soon the whole of Mali will become a desert. And . er . in East Afri

17、ca: here the grasslands are supporting too many animals and the result is, of course, theres no grass nothing for the animals to eat.I:Mm, yes, I see. Um . and the . the next film deals with North America?B:Thats right. In the . er . USA, as you know, intensive agriculture requires a plentiful suppl

18、y of rain for these crops to grow, I mean if there isnt enough rain the crops dont grow. And growing crops stabilize soil, without them the top soil just . it just blows away. I mean, this is also true for any region that is intensely farmed most of Europe, for example.I:And what did you find in Sou

19、th America?B:In South America (a . as in Central Africa and Southern Asia) tropical forests are being cut down at an alarming rate. Th . this is done so that people can support themselves by growing food or to create ranches where cattle can be raised to exp . to be exported to Europe or America as

20、tinned meat. The problem is that the s . the soil is so poor that . um . that only a couple of harvests are possible before this very thin soil becomes exhausted. And it cant be fed with fertilizers like agricultural land in Europe.Um . for example, in Brazil in 1982 an area of jungle the size of Br

21、itain and France combined was destroyed to make way for an iron ore mine. I mean, huge numbers of trees are being cut down for export as hardwood to Japan, Europe, USA . I mean . to make things like luxury furniture. These forests cant . er . they cant be replaced the forest soil is thin and unprodu

22、ctive and in just a few years, a . a jungle has become a waste land. Tropical forests contain rare plants (which . er . we can use for medicines, for example) and animals one animal or plant species becomes extinct every half hour. These . er . forest trees . I mean . also have worldwide effects. Yo

23、u know, they convert carbon dioxide into oxygen. The consequence of destroying forests is not only that the climate of that region changes (because there is less rainfall) but this change affects the whole world. I mean, over half the worlds rain forest has been cut down this century.Part 3 AI-Inter

24、viewerB-Brian CowlesI:So, Brian, would you agree that what we generally think of as natural disasters are in fact man-made?B:Yes, by and large. I mean, obviously not hurricanes or earthquakes, but take flooding, for example. Practically every year, the whole of Bangladesh is flooded and this is gett

25、ing worse. You know, the cause is that forests have been cut down up in Nepal and India, I mean higher up-river in the Himalayas. Trees would hold rainfall in their roots, but if theyve been cut down all the rain that falls in the monsoon season flows sraight into the river Ganges and floods the who

26、le country. The reason for flooding in Sudan is the same the forests higher up the Blue Nile in Ethiopia have been destroyed too.I:Well, this all sounds terribly depressing. Um . What is to be done? I mean, can anything be done, in fact?B:Yes, of course it can. First, the national governments have t

27、o be forward-looking and consider the results of their policies in ten or twenty years, not just think as far ahead as the next election. Somehow, all the countries in the world have to work together on an international basis. Secondly, the population has to be controlled in some way: there are too

28、many people trying to live off too little land. Thirdly, we dont need tropical hardwood to make our furniture its a luxury people in the West must do without. Softwoods are just as good, less expensive and can be produced on environment-friendly tree farms, where trees are replaced at the same rate

29、that they are cut down.I:And, presumably, education is important as well. People must be educated to realize the consequences of their actions?B:Yes, of course.I:Well, thank you, Brian.BI-InterviewerB-Brian CowlesI:So, Brian, would you agree that what we generally think of as . er. as er . natural d

30、isasters are in fact man-made?B:Yes, by and large . er . I mean, obviously not hurricanes or earthquakes, but take flooding, for example. I mean, practically every year, the whole of Bangladesh is flooded and this is getting worse. You know, the cause is that forests have been cut down up in Nepal a

31、nd India . I mean . higher up-river in the Himalayas. Trees .er . would hold rainfall in their roots, but if theyve been cut down all the rain that falls in the monsoon season flows straight into the river Ganges and floods the whole country. The reason for flooding in Sudan is the same the forests higher up the Blue Nile in Ethiopia have been destroyed too.I:Well, this all sounds terribly depressing. Um . what is to be done? I mean, can anything be done, in fact?B:Yes, of course it can . er . first, the na