C、D三项都是细节。

　　2．According to scientists, the DIRECT cause of more and fiercer storms is .

　　A．greenhouse gas emissions in industrialized nations

　　B．higher surface water temperatures of the sea

　　C．continuous global warming

　　D．rising sea levels

　　解析：选B　细节理解题。根据第三段中"Many scientists connect higher surface water temperatures resulting from global warming to greater and more damaging storms."可判断出造成严重的暴风雨的直接原因是海洋表面水温太高。

　　3．Laupepa was not satisfied with the United States because it did not .

　　A．agree to reduce its greenhouse gas emissions

　　B．sign an agreement with Tuvalu

　　C．allow Tuvaluans to move to the US

　　D．believe the problems facing Tuvalu were real

　　解析：选A　细节理解题。第四段第一句话表示Laupepa对美国不满意的原因是美国拒绝签署号召工业化国家减少温室效应气体排放的国际性公约。

　　4．The country whose situation is similar to that of Tuvalu is .

　　A．Australia　　　　　　 B．New Zealand

　　C．the Maldives D．the United States

　　解析：选C　细节理解题。根据最后一段可判断出the Maldives与Tuvalu的情况相似。

　　B

　　In the atmosphere, carbon dioxide allows the sun's rays to enter but prevents the heat from escaping. According to a weather expert's prediction, the atmosphere will be warmer in the year 2050 than it is today, if man continues to burn fuel at the present rate. If this warming up took place, the ice caps in the poles would begin to melt, thus raising sea level several meters and severely flooding coastal cities. Also, the increase in atmospheric temperature would lead to great changes in the climate of the northern hemisphere.

In the past, concern about a man­made warming of the earth has concentrated on the Arctic because the Antarctic is much colder and has a much thicker ice sheet. But the weather experts are now paying more attention to West Antarctic, which may be affected by only a few degrees of warming, in other words, by a warming on the scale that will possibly take place in the next fifty years from the burning of fuels. Satellite pictures show that large areas of Antarctic ice are already