Climate change is responsible for this. In any sea of ​​the world, oxygen is less than 200 to 800 meters. But the amount of oxygen is less in this depth of death. "Quiz said, oxygen needed to live for fish, marine plants or any other organism. In the absence of this oxygen they can not live in that area. This is a terrible environmental disaster, the consequences of which people will also suffer. There is also a threat to life-sustaining communities on the sea there. "And as the researchers thought, the level of environmental disaster in that area was worse than that.