【題目】2001年11月，太平洋上美麗的島國﹣﹣圖瓦盧領(lǐng)導(dǎo)人在一份聲明中說，．他們對抗海平面上升的努力已告失敗，并宣布他們將放棄自己的家園，舉國移民新西蘭．圖瓦盧成為全球第一個(gè)“環(huán)境難民”國家的主要原因是（　�。�
A.近年來全球降水增多
B.二氧化碳排放增多使全球變暖
C.人為地破壞海洋環(huán)境
D.圖瓦盧人口增長迅速

【答案】B
【解析】全球變暖是由多種原因造成的，其中人類活動(dòng)排放的溫室氣體過多造成大氣的保溫功能增強(qiáng)是一個(gè)不可忽視的原因． 圖瓦盧成為全球第一個(gè)“環(huán)境難民”國家的主要原因是二氧化碳排放增多使地球不斷變暖，兩極的冰川融化，海平面上升造成．故選項(xiàng)B符合題意．故選：B．

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