Lượng băng Bắc Cực giảm kỷ lục
Cập nhật: 15:10 12/09/2011 GMT+7
Theo nghiên cứu của các nhà khoa học Đức, lượng băng Bắc Cực trong mùa hè này đã xuống mức thấp kỷ lục do sự ấm lên của khí hậu toàn cầu.
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