Barack Obama has thrown his weight behind a deal on climate change by announcing he will attend the Copenhagen summit with a pledge for a 17 per cent cut in US emissions.
巴拉克·奧巴馬(Barack Obama)宣布將帶著美國削減17%排放量的承諾，參加哥本哈根峰會，以此表示他支持達成氣候變化協(xié)定。
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