5 Choose the best topic sentence for the

5 Choose the best topic sentence for the

paragraph in the READ LETTER box.

1 Paragraphs are important ways to organise a text.

2 You can improve your reading speed by concentrating on the opening sentences of paragraphs.

3 In different languages and cultures, paragraphs are written in different ways.

READING

6 Read only the topic sentences of each paragraph in this newspaper article. Then choose the best summary of the text a), b) or c).

7 Read the article again. Are these statements true

or false or does the text not say?

1 The engineering ideas will be useful if we don't decrease our C0₂ production, true

2 In Norway, the C0₂ is removed when the natural gas is used.

3 The carbon removal methods could be very effective.

4 There are three ideas for reflecting more solar energy.

5 The space mirror is an expensive idea._______

6 It is not difficult to control the cloud formation method.

7 Most of the ideas are dangerous for the planet._____

8 Scientists mustn't create more problems with their solutions.

S

cientists are thinking the unthinkable: can engineering projects save the world from global warming? How can we save the planet if we can’t reduce our production of carbon? There are two main approaches to this question.

One approach involves the removal of carbon

from fossil fuels. There are two ways to do this. The first involves removing carbon from the fuel before it is burnt. Currently, this happens in Norway where C0₂ is removed from natural gas as it comes out of the ground. The second involves capturing the C0₂ when it is produced by power stations. Both of these methods are expensive, but they could reduce the C0₂ produced by 90 percent.

The other approach is to reduce the amount of solar energy which hits the Earth. Some scientists have suggested putting a giant mirror in space. Others have suggested increasing the number of clouds over the oceans because they reflect back the sun’s rays. This last technique has the advantage of being easy to stop and start.

There are many unanswered questions about these ideas, but they must be safe and not cause more damage. Any large engineering projects mustn’t harm the Earth or the life on it. Otherwise, the cure for global warming might be worse than the original illness.

a) Scientists have had several ideas for fighting global warming, such as removing carbon from fuel. When the plans are finished, they will need to be safe and not expensive.

b) Scientists are designing engineering projects to fight global warming. There are two approaches: removing carbon from fossil fuels and reducing the solar energy that reaches the planet. The designs are not finished yet and should be safe.

c) If we can reduce the carbon in fuel or the solar energy that hits the Earth, we can win the fight against global warming. There are many possible solutions to the problem. Governments haven’t decided which plan to follow, but they want plans that are safe.

The environment

Дата добавления: 2015-09-29