As the temperatures continue to rise on the planet, it is not just the surface dwellers that will need to adapt. The University of California has conducted a study on what had happened the last time the environment took a hit this badly and how it affected the oceans. The rising temperatures and human interference has caused the oxygen levels in the ocean to fall creating dead zones. It has been estimated that almost 10% of the ocean is made up of dead zones and that number continues to rise. This is not the first time in history that dead zones have torn across the ocean killing a large amount of species. Dead zones can destroy entire aquatic ecosystems and are a massive cause of species becoming extinct. The problem with these dead zones is that the ocean takes much more time to recover environmental damage than any other area on the planet. Checking out this article gives a much more in-depth look at the problem.