任务型阅读。

     阅读下面的短文，请根据短文后的要求答题(请注意问题后的词数要求)。

    You might think that "global warming" means nothing more than a rise in the world's temperature.

But rising sea levels caused by it have resulted in the first evacuation (撤离) of an island nation-the

citizens of Tuvalu will have to leave their homeland.

      During the 20th century, sea level rose 8-12 inches. As a result, Tuvalu has experienced lowland

flooding of salt water which has polluted the country's drinking water.

    Paani Laupepa, a Tuvaluan government official, reported to the Earth Policy Institute that the nation

suffered an unusually high number of fierce storms in the past ten years. Many scientists connect higher

surface water temperatures resulting from global warming to greater and more damaging storms.

    Laupepa expressed dissatisfaction with the United States for refusing to sign the Kyoto Protocol, an

international. agreement calling for industrialized nations to reduce their greenhouse  gas  emissions (导

致温室效应的气体排放 ) , which are a main cause of global warming. "By refusing to sign the

agreement, the US has effectively taken away the freedom of future generations of Tuvaluans to live

where their forefathers

have lived for thousands of years," Laupepa told the BBC.

    Tuvalu has asked Australia and New Zealand to allow the gradual move of its people to both

countries .

      Tuvalu is not the only country that is vulnerable(易受影 响的) to rising sea levels. Maumoon

Gayoon,  president of the Maldives, told the United Nations that global warming has made his country

of 311,000 an "endangered nation".

1. What is the direct cause of more and fiercer storms according to scientists? (no more than 8 words)

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2. Why was Laupepa not satisfied with the United States? (no more than 10 words)

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3. Which country' s situation is similar to that of Tuvalu ? (no more than 2 words)

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4. What is the text mainly about? (no more than 7 words)

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