First, the temperature will go up as high as 45°C~50°C during the day and 0°C at night in Seoul. The sea absorbs heat during the day and gives off the heat at night. Also, the ocean current acts as a huge conveyor that moves the hot heat of the equator to the poles. But if the sea disappears, temperatures go to extremes so typhoons get stronger. Everything will fly away. For example, schools, buildings, and even you will fly away.

Second, the marine planktons will not exist anymore. Normally 30~50% of the oxygen on the earth is made from trees. And the rest of it is made from the sea with the help of marine planktons. If there is no sea, large organisms like elephants become difficult to survive decades later because they don’t have enough oxygen to breathe. Centuries later, breathing could become difficult even for humans.

Third, methane gas would make the earth 25 times hotter than now. There is a huge amount of methane on the sea bed, which has been kept under pressure by seawater for thousands of years. If the sea disappears, the earth will be a much hotter place to live in. The earth will become polluted much faster than it is now because when the earth gets hotter, more germs and mold can grow. Food and other things can spoil more easily. If this keeps happening, many eco systems could be damaged. In the end, it could become harder for people, animals, and plants to live.