We know the earth of temperature is slowly warming and sea lefel is rising slowly , and new report say, it may happen so fast now a day. according to the report today, the antarctic is growing melt sea level 13 feet higher even that is more happen. if sea level is growing up about 20 feet. wall street in the U.S may be  submerged . It is very serious. we have to reduce  using spray,air-condition. etc… the cause of raising sea level, I think it may submerge the earthe in the future. .