A dead zone is an area in the ocean which has little life due to a deficiency of oxygen. It is caused by initial over-abundance of life due to pollution by fertilizer or sewage. The process is called eutrophication.
External links and further reading[]
- "Rapid Growth Found in Oxygen-Starved Ocean ‘Dead Zones’" article by Bina Venkataraman in The New York Times August 14, 2008