Dalles Chronicle: The oceans cover over two-thirds of our planets surface, making it hard to imagine we humans could do them much damage.
Unfortunately, along with ocean acidification, global warming and the Giant Pacific Trash Vortex, ocean dead zones are increasingly in the news.
Dead zones are the popular name for hypoxic regions, areas in an ocean or large lake depleted of oxygen. When oxygen levels drop too low, fish or other animals that can move fast enough flee the area. Crabs, starfish, clams and other...