Vì sao băng trên Trái Đất tan nhanh hơn dự báo
Cập nhật: 07:47 05/07/2011 GMT+7
Không khí nóng lên trước tác động của thay đổi khí hậu không phải là yếu tố duy nhất làm gia tăng tốc độ tan chảy băng tại các điểm cực của Trái Đất...
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