English Unlimited HAK/HUM 4/5, Schulbuch mit Audio-CD und CD-ROM (mit Handelskorrespondenz)

93 Saving the world 08 LANGUAGE SKILLS EXPLORE EXTRAS The article below describes four of the ideas. Which involves:   reducing CO 2 levels?   absorbing the sun’s heat?   deflecting the sun’s rays? b Look at the image that was not mentioned in the article. What do you think it shows and how might it work? Read more about it on p. 202. After could and would , we can use an active or a passive infinitive. Complete the gap. Active: The apparatus would extract carbon dioxide. Passive: Carbon dioxide would . Find more examples of each type in the article on p. 202. Cover the article above and complete the sentences. Choose an active or passive infinitive, using the verbs in the box. 1 Giant sunshade: the sunshades would , so the temperature of the atmosphere would . 2 Sulphur rockets: the sulphur would , and it would . 3 Pumping sea water: this would . The sun’s rays would . 4 Plankton farms: plankton could . The plankton would . Read the article again. Did it use the verbs you chose? Consider each of the five proposals to fight global warming in turn. 1 Do you think it is likely to work? 2 Do you think it would help combat global warming? 3 In which proposals would cost or energy consumption be a problem? a LANguAgE FOCus 4 Active and passive infinitives b a 5 b a 6 deflect a small percentage of the sun’s rays back into space b spEAkINg 7 Climate change is being experienced everywhere in the world, and just reducing carbon emissions may not be enough. Some scientists are now beginning to suggest more radical inventions that might save us from disaster by actually putting the greenhouse effect into reverse. One scientist is proposing to put a huge glass sunshade in space which would orbit the Earth so that it would always face the sun. This would deflect some of the sun’s rays back into space, so the temperature of the atmosphere would be reduced. Another proposal is to fire rockets loaded with sulphur into the stratosphere. The sulphur would be released and it would form a thin cloud-like layer around the Earth, which would block some of the sun’s rays. Another interesting idea is to pump fine particles of sea water into the clouds . This would increase the thickness of the clouds, so the sun’s rays would be reflected. This could be done using remote- controlled yachts, so the energy cost would be zero. Another possibility would be to create enclosed ‘plankton farms’ in the sea, where plankton could be fed huge quantities of fertiliser. This would make the plankton grow and absorb CO 2 from the air. Proposals like these may seem like science fiction, but some experts believe we may soon be forced to take them seriously, for the sake of our planet. release  reduce  form  feed increase  reflect  block  absorb deflect Nur zu Prüfzwecken – Eigentum des Verlags öbv