Directions: There are 7 passages in this section. Each passage is followed by some questions or unfinished statements. For each of them there are four choices marked A, B, C, and D. You should decide on the best choice.

Passage 8

It’ s becoming very dangerous to sit in the sun. If you have a fashionable sun tan, it doesn’ t necessarily mean that you have lots of outdoor activities- but it does mean that you’ re n greater danger of getting skin cancer and cataracts. 

The ozone layer, which protects us from the sun’ s dangerous ultra-violet rays, is progressively deteriorating. In February 1992 a scientific report said that people in Canada, Northern Europe and Russia were in serious danger. 

In 1985, the news of destruction of the ozone layer in the South Pole alarmed people in the Southern Hemisphere. In Australia, there are now three times more cases of skin cancer than in the past. In New Zealand, teachers tell schoolchildren to wear hats and nor to sit in the sun. 

What causes the destruction of the ozone layer? Mostly chlorofluorocarbons (CFCs) . Aerosol sprays, refrigerators, air conditioners, as well as industrial chemicals, send chlorofluorocarbons into the atmosphere. 

Australia governmentis now trying very hard to forbid CFCs, but it is expensive and difficult to do so. After the first ozone alarm in the Southern Hemisphere, ecologists allover the world asked governments to take strict measures immediately. Some governments did, but not soon enough. Other countries believe that they have problems which are more important. Now stricter measures are going to be taken, but already a lot of damage has been done.