Mức CO2 trong khí quyển cao nhất trong 3 triệu năm

Cập nhật: 07:30 02/05/2013 GMT+7

Tân Hoa xã cho biết theo trị số đo được của đài thiên văn ở Hawaii, một số nhà nghiên cứu của Mỹ cho rằng trị số trung bình của nồng độ CO2 trong khí quyền sẽ đạt trên 400 ppm vào đầu tháng 5 này...

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