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Junta deCastilla LenConsejera de Educacin

GLOBAL WARMINGW e usually think that the greenhouse effect is ma n ma de, but actually it is a naturalphenomenon. G ases in the earth's atmosphere trap som e of the heat from the sun andthis keeps the plan et warm eriough for life to survive. H owe ver, man is responsible forthe enhanced greenho use effect . This is what cau ses global,wa rming. Burning fuelslike wood, coa1 or petrol produces carbon dioxide (C02) and other gases. The mixtureof gases in the atm osphere becomes too concentrated, too m uch heat is trapped andthe earth gets hotter. The only way to stop g lobal warming is to reduce the emission ofthese gases. Why is global warming such a problem?Most scientists agree that global warming ma y have very serious consequences for lifeon the planet.Firstly, the increase in temperature may m elt the ice in the N orth Pole. As a result, sealevels may rise, which might cause floods in some countries. As it becomes warmer,more water will evaporate from seas and lakes. This might cause more clouds andmore rain in some regioris. Some scientists think that there will be more storms andhurricanes as a result of global warming. At the same time, areas which are dry nowma y have less rain. Farm ers might not be able to grow traditional crops because therernight be too much or too little rain. Finally, certain diseases might increase. Forexample, some scientists say that another 20% of the world's population might live inareas where you can ge t malaria.1. Read the text and answer these questions in English. 2 puntos .a) What would hap pen to the earth without the na tural greenhouse effect?

b) What causes global warming?

c) How can we redu ce global warming?

d) Why may global warming affect agriculture?

e) Wh y can global warm ing be dangerous for hum an life?

2. Ask questions about the words that are underlined 1 punto .a) She has lunch at home.

b) She alwavs takes the bus.

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Junta deastilla y Lenonsejera d e Educacin

c) The children are 14 vears old.

d) George plays football.

e) Something happens on Nlondays.

3. Write comparative se n te ~ c es ith the information provided. l punto).a) Kevin: lm76; Greg l m 73 tall)

b) Len: 7OC, Madrid 12OC cold)

c) London 50 kms, Brighton 50 kms far)

d) Book 1: 350 pages ; Book 2 :325 pages long)

e) Cassette 10 euros ; CD 12 euros expensive)

4 Ma ke these sentence s negative. 1 punto).a) She ate some fruit.

b) She came to Madrid..

c) She said yes.

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Junta d eastilla y LenConsejera e Educacin

d) She took som e photographs.

e) He asked a lot of questions.

5. Add question tags to the following sentenc es. 1 punto).a) The shops are open,

b) They don't know us,

c) You've got a Fiat,

d) The policeman saw the accident,

e) Mike can swim,

6. Use sho uldl should n't to give advice in these situations. 1 punto).a) 1 m getting fat . You ...

b) My car is too old .

c) 1 can't sleep at night .

d) I want to pa ss my exams .

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