Cảnh báo nguy cơ di dân ồ ạt khi nhiệt độ tăng thêm 2 độ C
Cập nhật: 14:42 15/06/2016 GMT+7
Các nhà khoa học Mỹ vừa cảnh báo nguy cơ giảm dân số do tình trạng di dân tại Mexico, Trung Mỹ, châu Phi, Ấn Độ và những khu vực nhiệt đới khác do tình trạng biến đổi khí hậu.
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