高中英语人教版高二上11

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[00:00.00]和谐英语学习网 Unit 9 Saving the earth
[00:04.41]Lesson 33
[00:07.76]1.Dialogue
[00:11.60]Jackie is talking to Yang Pei about a conference which Jackie has just been to.
[00:18.96]What was the conference like?
[00:22.41]Very interesting.It was called "Saving the earth"
[00:27.27]and it was all about the damage that is being caused to the world.
[00:32.44]What did you do at the meeting?
[00:35.68]Well, we listened to lectures about pollution,
[00:40.65]agrculture,nuclear waste,radia-tion and so on.
[00:46.81]It's good idea to hold such conferences.
[00:51.17]Yes.If we go on polluting the world,it won't b fit for us to live in.
[00:57.94]I agree with you.We've got to so something about pollution.It's getting worse.
[01:04.50]Yes,it certainly is.
[01:07.97]If people don't sop pollutting the seas and rivers,there will be no fish left.
[01:14.14]That's quite true.We've got to think of ways of changing people's habits.
[01:20.38]Well,what else did you hear about at the meeting?
[01:24.74]There was a good talk about the increase in the world's population.
[01:30.10]If the population keeps growing so quickly,
[01:34.46]there will only be standing room left for us next century!
[01:39.45]That's a problem we Chinese must pay special attention to.
[01:44.41]Lesson 34
[01:52.46]2.Reading comprehension
[01:56.82]Read the three passages.
[02:00.29]Find the places on the map of the world where the damage has happened.
[02:05.57]EARTH
[02:07.92]The area of desert in the world is growing every year.
[02:12.88]Many parts of the world,
[02:16.05]which once had large populations and produced plenty of crops,
[02:21.51]have become deserts.
[02:24.67]Dunhuang in China,deep in the heart of the Gebi Desert,was once a great city.
[02:31.51]Cattle are one cause of the problem.
[02:35.35]In good years,farmers increase the numbers of their cattle.
[02:40.60]Then one year,the rains fail to come.
[02:44.96]The farmers do not want to kill any of their cattle,
[02:49.33]so the cattle eat all the grass and anything that grows on poorer land.
[02:55.07]If this continues for several years,
[02:58.91]the grass never grows again and the land becomes a desert.
[03:04.06]One suggested answer is for farmers to limit the numbers of their cattle.
[03:09.73]Another problem is that good soil is gradually lost.
[03:14.59]When trees are cut down,
[03:17.93]there is nothing to hold the soil in place on the hillside.
[03:22.68]So when it rains,the soil is washed down the hills and into the rivers.
[03:28.64]Strong winds can also blow away the valuable soil
[03:33.68]that lies on the top of the fields.
[03:37.76]AIR
[03:40.21]Air pollution comes from factories,power stations and cars.
[03:46.27]Chemicals in the smoke from power stations cause a lot of damage.
[03:52.02]They can travel hundreds of miles in the wind,
[03:56.38]before falling to the ground in the rain.
[04:00.33]But this "chemical rain"
[04:03.98]gradually destroys trees in the forests and kills fish in the lakes.
[04:10.25]In Germany,over 50% of the country's trees had been damaged by the year 1986.
[04:19.00]Time and time again there ate serious accidents that pollute the air.
[04:25.25]In 1986 there was a bad accident at a nuclear power station in Russia.
[04:32.69]A cloud of radiation crossed the whole of Europe.
[04:37.84]It is said that 125,000 people died in Russia
[04:43.77]as a result of illnesses caused by this accident.
[04:48.52]In 1984 there was a serious accident at a factory in India
[04:54.69]and a cloud of dangeous gas covered the town of Bhopal.
[05:00.15]Over 2500 people were killed that night,
[05:05.74]and hundreds of thousands of people were injured.
[05:13.00]WATER
[05:15.45]Water pollution is caused by waste from factories and cities.
[05:21.62]Oceans are able to clean themselves,
[05:25.77]but certain seas,once they become dirty,are not able to do so.
[05:32.23]One example is the mediterranean which lies between Europe and Africa.
[05:38.78]It has only one narrow entrance to the ocean in the west.
[05:44.24]One quarter of the shores of the Mediterranean are polluted