一

Over the past century, the global mean temperature has topped itself repeatedly due to the large volume of greenhouse gases emissions. Meanwhile the sea level is rising for 0.10-0.15 meters every century, and 6 ℃ higher will cause the extinction of human beings. From these data, we can imagine that in the near future of decades how many mankind civilizations will be buried and stay below water forever and how many people will live in misery and suffering due to the melting icebergs. By then