Number 18, exercise 20.0:05
Listen to the final part of the text B. And try to read it in the same manner.0:10
When the Americans decided to clean up the Statue of Liberty in 1986, the first thing they had to do was to make a hole in her nose and take away the acid rain that had collected inside.0:25
The polluted air of New York had mixed with the rain and damaged the statue badly.0:39
And you certainly know that most of the pollution in big cities comes from cars and buses.0:45
More and more often, people are told not to spend too much time in direct sunlight because ultraviolet radiation from the sun can.0:52
Can cause skin cancer.0:59
Normally, the ozone layer in the atmosphere protects us from such radiation.1:01
But if there are holes in the ozone layer, ultraviolet radiation can get to the Earth.1:06
Many scientists think that these holes are the result of air pollution.1:12
Nuclear power stations can go wrong and cause nuclear pollution.1:18
This happened in Windscale in Britain, in Three Mile island in the USA and Chernobyl in the former Soviet Union.1:22
Nuclear pollution cannot be seen, but its effects can be terrible.1:31
To make air clean again, we need good filters at nuclear power stations, at factories and plants, and also in cars and buses.1:36
Both clean air and clean water are necessary for our health.1:46
If people want to survive, they must solve these problems quickly.1:51
Man is beginning to understand that his environment is not just his own town or country, but the whole Earth.1:56
That's why people all over the world think and speak so much about ecology.2:03
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