高中英语人教版2000年高二上09

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[00:00.00]和谐英语学习网 Unit 9 Saving the earth                   Lesson 33 1  Dialogue
[00:09.30]Jackie is talking to Yang Pei about a conference which Jackie has just been to.
[00:16.67]What was the conference like?
[00:20.01]Very interesting.It was called "Saving the earth"
[00:25.05]and it was all about the damage that is being caused to the world.
[00:28.11]What did you do at the meeting?
[00:31.35]Well,we listened to lectures about pollution,
[00:36.31]agriculture,nuclear waste,radiation and so on.
[00:42.19]It's a good idea to hold such conferences.
[00:46.63]Yes.If we go on polluting the world,it won't be fit for us to live in.
[00:53.79]I agree with you.We've got to do something about pollution.It's getting worse.
[01:00.45]Yes,it certainly is.
[01:03.82]If people don't stop polluting the seas and rivers,there will be no fish left.
[01:10.06]That's quite true.
[01:13.12]We've got to think of ways of changing people's habits.
[01:17.87]Well,what else did you hear about at the meeting?
[01:22.23]There was a good talk about the increase in the world's population.
[01:27.28]If the population keeps growing so quickly,
[01:31.51]there will only be standing room left for us next century!
[01:36.47]That's a problem we Chinese must pay special attention to.
[01:41.51]Lesson 34  2 Reading comprehension
[01:52.46]Read the three passages.
[01:55.83]Find the places on the map of the world where the damage has happened.
[02:01.18]EARTH
[02:03.74]The area of desert in the world is growing every year.
[02:08.71]Many parts of the world,
[02:11.94]which once had large populations and produced plenty of crops,
[02:17.40]have become deserts.
[02:20.46]Dunhuang in China,deep in the heart of the Gebi Desert,was once a great city.
[02:27.44]Cattle are one cause of the problem.
[02:31.20]In good years,farmers increase the numbers of their cattle.
[02:36.55]Then one year,the rains fail to come.
[02:40.91]The farmers do not want to kill any of their cattle,
[02:45.28]so the cattle eat all the grass and anything that grows on poorer land.
[02:51.44]If this continues for several years,
[02:54.79]the grass never grows again and the land becomes a desert.
[02:59.83]One suggested answer is for farmers to limit the numbers of their cattle.
[03:05.50]Another problem is that good soil is gradually lost.
[03:10.46]When trees are cut down,
[03:13.70]there is nothing to hold the soil in place on the hillside.
[03:18.45]So when it rains,the soil is washed down the hills and into the rivers.
[03:24.51]Strong winds can also blow away the valuable soil that lies on the top of the fields.
[03:30.08]AIR
[03:32.53]Air pollution comes from factories,power stations and cars.
[03:38.59]Chemicals in the smoke from power stations cause a lot of damage.
[03:44.26]They can travel hundreds of miles in the wind,
[03:48.62]before falling to the ground in the rain
[03:52.46]But this "chemical rain" gradually destroys trees in the forests
[03:57.82]and kills fish in the lakes.
[04:01.79]In Germany,over 50% of the country's trees had been damaged by the year 1986.
[04:10.44]Time and time again there are serious accidents that pollute the air.
[04:16.68]In 1986 there was a bad accident at a nuclear power station in Russia.
[04:24.15]A cloud of radiation crossed the whole of Europe.
[04:29.30]It is said that 125,000 people died in Russia
[04:35.36]as a result of illnesses caused by this accident.
[04:40.11]In 1984 there was a serious accident at a factory in India
[04:46.35]and a cloud of dangerous gas covered the town of Bhopal.
[04:51.81]Over 2500 people were killed that night,
[04:57.40]and hundreds of thousands of people were injured.
[05:01.66]Many of the injured lost their sight.
[05:05.61]WATER
[05:08.17]Water pollution is caused by waste from factories and cities.
[05:14.23]Oceans are able to clean themselves,
[05:18.80]but certain seas,once they become dirty,are not able to do so.
[05:25.56]One example is the Mediterranean which lies between Europe and Africa.