無法挽回的兩度

專家警告，目前平均氣溫可能將達到臨界值，比正常氣溫高出兩度將引發一系列災難，可能導致全人類的滅絕。

Experts warn that the current rise in average temperature may reach a tipping point, two degrees above normal, engendering a series disasters that may wipe out the entire human species.